John decided to cycle his to his friends house at a speed of 5 kilometre per hour and the journey took 2 hour.

After the first hour John has cycle 5 kilometre

After 2 hours John has cycled 10 kilometre

Using formula of distance=speed x time, this would be calculated as:

Distance= 5*2=10 km.

.
In a class of 60 students, the number of boys and girls participating in the annual sports is in the ratio 3 : 2 respectively. The number of girls not participating in the sports is 5 more than the number of boys not participating in the sports. If the number of boys participating in the sports is 15, then how many girls are there in the class ?

Let the number of boys and girls participating in sports be 3x and 2x respectively.

Then, 3x = 15 or x = 5.

So, number of girls participating in sports = 2x = 10.

Number of students not participating in sports = 60 - (15 + 10) = 35.

Let number of boys not participating in sports be y.

Then, number of girls not participating in sports = (35 -y).

Therefore (35 - y) = y + 5 , 2y , 30 , y = 15.

So, number of girls not participating in sports = (35 - 15) = 20.

Hence, total number of girls in the class = (10 + 20) = 30.

.
In following question, A number series is given with one term missing. Choose the correct alternative

9 , 12 , 11 , 14 , 13 , x , 15

9 , 12 , 11 , 14 , 13 , x , 15

Alternately we add 3 and subtract 1. Thus,

9 + 3 = 12, 12 - 1 = 11, 11 + 3 = 14

and so on. Missing number = 13 + 3 = 16..

In alphabet series, some alphabets are missing which are given in that order as one of the alternatives below it. Choose the correct alternative.

b _ b _ bb _ _ bbb _ bb _ b

The series is babb / bbab / bbba / bbbb. Thus, in each sequence, a moves one step forward and b takes its place and finally in the fourth sequence, it is eliminated..

In following alphabet series , one term missing as shown by question mark . Choose missing term from options.

cx, fu, ir, ?, ol, ri

The first letter of each term is moved three steps forward and the second letter is moved three steps backward to obtain the corresponding letters of the next term.

.
10 evacuator works 10 hour daily to remove 2500 cubic feet of Earth in 3 days. How many evacuator work 6 hour daily to remove 5000 cubic feet of Earth in 2 days?

Let x evacuator are required.

Evacuators are inversely proportional to hours and days are directly proportional to work progress

So,

X/10=(10/6)*(5000/2500)*(3/2)

=48

.
A person speed at a rate of 40 km per hour. If he increases his speed by 20% what is his new speed in metre per minute?

Original speed= 40 km per hour

If the speed is increased by 20%

Then the new speed 20% of 40=8 km per hour

That is distance covered in 1 hour =8 km

Distance covered in 60 minute= 8000 m

The artist distance covered in 1 hour =8 km

Distance covered in one minute =133.3 m

.