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A train has a speed of 60 km//h for the ...

A train has a speed of `60 km//h` for the first one hour and `40 k/h` for the next half hour. Its average speed in `km//h` is

A

50

B

53.33

C

48

D

70

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(avg) = (60+20)/(1+1/2) = (80xx2)/(3) = 53.33`
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