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Question

A bus travelling along a straight highway covers one-third of the total distance between two places with a velocity 20kmh1. The remaining part of the distance was covered with a velocity of 30kmh1 for the first half of the remaining time and with velocity 50kmh1 for the next half of the time. Find the average velocity of the bus for its whole journey.

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Solution

Average velocity of bus to covers 23rd of total distance
=30+502=40m/s
Now average speed of whole journey =13x×20+23x×40x=1003m/s


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