Question

a bus moves from stop A to stop B with speed of 40 km/hr and then from stop B to stop A with a speed of 50 km/ hr . it's average speed is

Answer 1

Answer:

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Explanation:

SPEED=DISTANCE /TIME

SO, d=d/40

d=d/50

total distance=2d

total time= (d/40+ d/50)=90d/200

average speed=2d* 200/90d

                         =4.4444

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