A train is moving at a speed of 132 kmph. If the length of the train is 110 meters, how long will it take to cross a railway platform 165 m long?
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5 sec 7.5 sec 10 sec 15 sec |
7.5 sec |
Speed = \(\frac{ Distance}{ Time}\) 132 x \(\frac{5 }{ 18}\) = \(\frac{\text{ 110 + 165} }{ Time}\) \(\frac{660 }{ 18}\) = \(\frac{\text{ 275} }{ Time}\) Time = 7.5 seconds |