Question

A train covers the first half of the distance between two station at a speed of 10 m/sec and the

other half at 40 m/sec. Then its average speed for the journey is :

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Answer 1

Answer:

The average speed of the train is 40 km/hr.

Answer 2

Step-by-step explanation:

v = d/t

v = d/t1+t2

t = t1+t2 =d/2(v1) + d/2(v2)

= d/2×10+d/2×40

= d/20 + d/80

= 8d+2d/160

t=10d/160=d/16.

v = d/d/16

Therefore average speed = 16m/s...

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