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For a train that travels from one statio...

For a train that travels from one station to another at a uniform speed of `40 kmh^(-1)` and returns to initial station at speed of `60kmh^(-1)` then its average speed is

A

98 km/hr

B

0 km/hr

C

50 km/hr

D

48 km/hr

Text Solution

Verified by Experts

The correct Answer is:
D
`v_("avg") = (2v_(1)v_(2))/(v_(1) + v_(2))`
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