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Question

A car covers half the distance at a speed of 50km/h and the other half at 40km/h. Find the average speed of the car.

A
74.44km/h
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B
44.44km/h
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C
54.44km/h
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D
64.44km/h
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Solution

The correct option is B 44.44km/h
Let 2s be the displacement
Where time taken for s displacement is t1 with v1=50km/h
t1=s50
Time taken for another s displacement is t2 with v2=40km/h
t2=s40
Average velocity=2ss50+s40=44.44km/h

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