# Work, Profit & Loss Practice Questions & Tests

#### Question No 1

A can do a piece of work in 4 hours; B and C together can do it in 3 hours,while A and C together can do it in 2 hours.How long will B alone take to do it?

Solution!
A's 1 hour's work = 1/4! !(B + C)'s 1 hour's work = 1/3! !(A + C)'s 1 hour's work = 1/2! !(A + B + C)'s 1 hour's work = (1/4 + 1/3) = 7/12! !B's 1 hour's work = (7/12 - 1/2) = 1/12! !Hence, B alone will take 12 hours to do the work..

#### Question No 2

Alfred buys an old scooter for Rs. 4700 and spends Rs. 800 on its repairs. If he sells the scooter for Rs. 5800, his gain percent is

Solution!
Cost Price (C.P.) = (4700 + 800) = Rs. 5500! !Selling Price (S.P.) = Rs. 5800! !Gain = (S.P.) - (C.P.) = (5800 - 5500) = Rs. 300! !Gain % = (300/5500) * 100 = 60/5 %.

#### Question No 3

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

Solution!
Whole work is done by A in (20 * 5/4) = 25 days! !Now, (1 - 4/5) i.e., 1/5 work is done by A and B in 3 days.! !Whole work will be done by A and B in (3 x 5) = 15 days.! !A's 1 day's work = 1/25!(A + B)'s 1 day's work = 1/15! !So, B's 1 day's work = (1/15 - 1/25) = 4/150 = 2/75! !Hence, B alone would do the work in 75/2 = 37.5 days..

#### Question No 4

A man buys a cycle for Rs. 1400 and sells it at a loss of 15%. What is the selling price of the cycle?

Solution!
S.P. = 85% of Rs. 1400 =(85/100)*1400!=Rs. 1190.

Solution!

Solution!
Let cost price of the article is x.!15% of x = (15x)/100 = 3x/20! !Now!(3x/20) + 476 = x!3x+9520 = 20x!9520 = 17x!x = 560! !Hence cost price of the article is $560.. #### Question No 25 What will be the selling price of an article that was bought for$1150 and sold at profit of 6%?

Solution!
6% of 1150!= (1150*6)/100 = 69! !Selling price = 1150+69 = 1219.

#### Question No 27

4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it?

Solution!
Let, 1 man's 1 day's work = x!and!1 woman's 1 day's work = y! !Then, 4x + 6y = 1/8 nd 3x + 7y = 1/10! !Solving the two equations, we get!x = 11/400!y = 1/400! !So, One woman's 1 day's work = 1/400! !10 women's 1 day's work = (1/400 * 10) = 1/40! !Hence, 10 women will complete the work in 40 days..

#### Question No 28

X can do a piece of work in 40 days.He works at it for 8 days and then Y finished it in 16 days.How long will they together take to complete the work?

Solution!
Work done by X in 8 days = (1/40 * 8)!= 1/5! !Remaining work = (1 - 1/5)!4/5! !Now, 4/5 work is done by Y in 16 days.! !Whole work will be done by Y in (16 * 5/4)!= 20 days! !So,!X's 1 day's work = 1/40!Y's 1 day's work = 1/20! !(X + Y)'s 1 day's work = (1/40 + 1/20) = 3/40! !Hence, X and Y will together complete the work in 40/3 days.

#### Question No 29

A, B and C can complete a piece of work in 24, 6 and 12 days respectively.Working together,they will complete the same work in

Solution!
As we know that!If A can do a piece of work in n days, then A's 1 day's work = 1/n! !(A + B + C)'s 1 day's work = (1/24 + 1/6 + 1/12) = 7/24! !If A's 1 day's work = 1/n then,!A can finish the work in 'n' days.! !So, all the three together will complete the job in (24/7) days..

#### Question No 30

A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 days. The remaining work was done by A in

Solution!
(B + C)'s 1 day's work = (1/9 + 1/12) = 7/36! !Work done by B and C in 3 days = (7/36 * 3)!= 7/12! !Remaining work = (1 - 7/12)!= 5/12! !Now, 1/24 work is done by A in 1 day.! !So, 5/12 work is done by A in (24 * 5/12) = 10 days..

#### Question No 32

By selling a car for Rs. 495000 an agent gains 10%. What was his cost?

Solution!
Let cost price of the car is x.!10% of x = 10x/100 = x/10! !Now!495000 - (x/10) = x!4950000 - x = 10x!4950000 = 11x!x = 450000.

#### Question No 33

Price of an article decreased from $70 to$56. What is the percentage decrease?

Solution!
Decrease in price = 70-56 = 14! !Percentage decrease = (14/70)*100 = 20%.

#### Question No 35

Twenty women can do a work in sixteen days. Sixteen men can complete the same work in fifteen days. What is the ratio between the capacity of a man and a woman?

Solution!
(20 x 16) women can complete the work in 1 day.! !So, woman's 1 day's work = 1/320! !(16 x 15) men can complete the work in 1 day.! !So, 1 man's 1 day's work = 1/240! !So, required ratio = (1/240) / (1/320)!= (1/3) / (1/4) = 4/3.

#### Question No 36

25 tailors can make 35 dresses in 1 day. How many dresses can 6 tailors make in 5 days?

Solution!
Let x dresses can be made.!As dresses are directly proportional to tailors and days so!x/35 = (6/25)*(5/1)!x = 42! !Hence 42 dresses can be made by 6 tailors in 5 days..

#### Question No 37

John's income increased from $12000 to$14400. What is percentage increase in his income?

Solution!
Increase in income = 14400 - 12000 = 2400! !Percentage increase = (2400/12000)*100 = 20%.

#### Question No 38

A farmer bought a cow for Rs. 14000 and sold it for Rs. 15400. Find his profit percentage.

Solution!
Profit = 15400 - 14000 = 1400! !Profit percentage = (1400/14000)*100 = 10%.

#### Question No 39

Some articles were bought at 6 articles for Rs. 5 and sold at 5 articles for Rs. 6. Gain percent is

Solution!
Suppose, number of articles bought =L.C.M. of 6 and 5!= 30! !C.P. of 30 articles = (5/6) * 30 = Rs. 25! !S.P. of 30 articles = (6/5)*30! = Rs. 36! !Hence, Gain % = (11/25) * 100 = 44%.

#### Question No 40

Price of a car increased from $400000 to$420000. What is the percentage increase?

Solution!
Increase in price = 420000 - 400000! = 20000! !Percentage increase = (20000/400000)*100! = 5%.

#### Question No 41

A can do a work in 15 days and B in 20 days.If they work on it together for 4 days,then the fraction of the work that is left is

Solution!
A's 1 day's work = 1/15! !B's 1 day's work = 1/20! !(A + B)'s 1 day's work = (1/15 + 1/20) = 7/60! !(A + B)'s 4 day's work = (7/60 * 4) = 7/15! !Therefore, Remaining work = (1 - 7/15) = 8/15.

What will be the selling price of an article that was bought for $350 and sold at a loss of 14%? #### Select the correct answer Solution! 14% of 350!(350*14)/100 = 49! !selling price of the article = 350 - 49 = 301. #### Question No 43 Cost price of a camera was$430 and it was sold at profit of 16%. What is its selling price?

Solution!
16% of 430 = (430*16)/100 = 68.8! !Selling price = 430 + 68.8 = 498.8.

#### Question No 44

10 women can complete a work in 7 days and 10 children take 14 days to complete the work.How many days will 5 women and 10 children take to complete the work?

Solution!
1 woman's 1 day's work =1/70! !1 child's 1 day's work =1/140! !(5 women + 10 children)'s 1 day's work = (5/70 + 10/140) = (1/14 + 1/14) = 1/7! !Hence, 5 women and 10 children will complete the work in 7 days..

Solution!
Let cost price of the television is x.!12% of x = 12x/100 = 3x/25! !Now!(3x/25)+572 = x!3x + 14300 = 25x!14300 = 22x!x = 650! !Hence cost price of the television is $650.. #### Question No 47 A can finish a work in 18 days and B can do the same work in 15 days. B worked for 10 days and left the job. In how many days, A alone can finish the remaining work? #### Select the correct answer Solution! B's 10 day's work = (1/15 * 10) = 2/3! !Remaining work = (1 - 2/3) = 1/3! !Now, 1/18 work is done by A in 1 day.! ! Hence, 1/3 work is done by A in (18 * 1/3) = 6 days.. #### Question No 48 By selling an article for$200 shopkeeper looses 20%. What is cost price of the article?

Solution!
Let cost price of the article is x.! !20% of x = (x*20)/100 = x/5! !Now!(x/5) + 200 = x!x+1000 = 5x!4x = 1000!x = 250! !Hence cost price of the article is 250..

#### Question No 49

A vendor bought toffees at 6 for a rupee. How many for a rupee must he sell to gain 20%?

Solution!
C.P. of 6 toffees = Re. 1! !S.P. of 6 toffees = 120% of Re. 1 = Rs. 6/5! !For Rs. 6/5,!toffees sold = 6.! !For Re. 1, toffees sold = (6 * 5/6) = 5.

#### Question No 50

A salesman bought a pen for Rs. 100 and sold it for Rs. 110. What is his profit percent?

Solution!
Profit = 110 - 100 = 10! !Profit percentage = (10/100)*100 = 10%.

#### Question No 51

With an increase of 12% salary of Ali became Rs13440. What was his salary before increase?

Solution!
Let before increase Ali's salary was x.!12% of x = 12x/100 = 3x/25! !Now!13440 - 3x/25 = x!336000 - 3x = 25x!336000 = 28x!x = 12000! !Hence Ali's salary before increase was Rs. 12000.

A shopkeeper bought an article for $120 and sold at profit of 10%. What is selling price of the article? #### Select the correct answer Solution! 10% of 120!= (120*10)/100 = 12! !Selling price = 120+12 = 132. #### Question No 53 A trader mixes 26 kg of rice at Rs. 20 per kg with 30 kg of rice of other variety at Rs. 36 per kg and sells the mixture at Rs. 30 per kg.His profit percent is #### Select the correct answer Solution! C.P. of 56 kg rice = (26 x 20 + 30 x 36) = (520 + 1080) = Rs. 1600! !S.P. of 56 kg rice = Rs. (56 x 30) = Rs. 1680! !Hence, Gain = (80/1600)*100 = 5%. #### Question No 54 A car was bought for$380000 four years ago and during these four year it price decreases by 12%. What is its value now?

Solution!
12% of 380000!(380000/100)*12 = 45600! !Price of the car = 380000 - 45600 = 334400.

#### Question No 55

A takes twice as much time as B or thrice as much time as C to finish a piece of work.Working together,they can finish the work in 2 days.B can do the work alone in

Solution!
Suppose A, B and C take x, x/2, x/3 days respectively to finish the work.! !Then,!(1/x + 2/x + 3/x) = 1/2!6/x = 1/2!x=12! !So, B takes (12/2) = 6 days to finish the work..

#### Question No 56

A can do a certain work in the same time in which B and C together can do it.If A and B together could do it in 10 days and C alone in 50 days,then B alone could do it in

Solution!
(A + B)'s 1 day's work = 1/10! !C's 1 day's work = 1/50! !(A + B + C)'s 1 day's work = (1/10 + 1/50) = 6/50 = 3/25...(1)! !A's 1 day's work = (B + C)'s 1 day's work .... (2)! !From (1) and (2), we get!2 * (A's 1 day's work) = 3/25! !A's 1 day's work = 3/50! !So, B's 1 day's work (1/10 - 3/50) = 2/50 = 1/25! !Hence, B alone could do the work in 25 days..

#### Question No 57

Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is

Solution!
Ratio of times taken by Sakshi and Tanya = 125/100 = 5/4! !Suppose Tanya takes x days to do the work.! !5/4 = 20/x!x = (4*20)/5! !x = 16 days.! !Hence, Tanya takes 16 days to complete the work..