Answers

2015-01-03T18:23:55+05:30
(1). Time taken by train in passing a telegraph post(T₁) = (Length of train)÷(Speed of train)
Speed(v) = 54 km/h = 54×5/18 = 15 m/s
T₁ = 225/15 = 15 seconds

(2). Time taken by train to passing a 150 m long platform(T₂) = (Length of the train + Length oh platform)÷(speed)
T₂ = (225+150)÷(15) = 375/15 = 25 seconds

(3). Similarly Time taken by the train to cross a bridge(T₃) = (225+105)/15
T₂ = 330/15 =22 seconds
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