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Two trains, each 50 m long are travellin...

Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s. The time of crossing is

A

2S

B

4S

C

`2sqrt3s`

D

`4sqrt3s`

Text Solution

Verified by Experts

The correct Answer is:
B
Relative velocity = 10 - (-15) = 25m/s
time =`(50+50)/(25) = 4sec`
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