a 320 m long train takes 80 seconds more to cross a platform twice its length than it takes to cross a pole at the same speed. what is the speed of the train in m/s?
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Answered by
1
let the speed = v
time to cross the platform = (320 + 2 x 320) / v
time to cross the pole = 320 / v
According to ques,
(320 + 640) / v = (320 / v ) + 80
=> v = 640 / 80 = 8 m/s ..... ans....
Answered by
3
Answer:
Explanation:
He takes 80s more to cross 640m
i.e speed =640/80
=8m/s
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