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Two trains, e...

Question

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

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2√3 s

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Solution

The correct option is B 4s
Time = $\frac{T o t a l l e n g t h}{R e l a t i v e v e l o c i t y} = \frac{50 + 50}{10 + 15} = \frac{100}{25}$ = 4 sec

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