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Today's Challenge
Question of the Day
A car travel first half distance between two places with a speed of 40 km per hour and the rest of half distance with the speed of 60 km per hour. The average speed of car is:
48
45
40
35
Solution!
Let the total distance covered be "s"km.
Total time taken,
=(s/2)/40+(s/2)/60
=5s/240
Average speed,
=s/(5s/240)
=s*(240/5s)
=48 km/ hr
.
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