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A 152.5 meter long train running at a speed of 57 km/h crosses a platform in 39 seconds. What is the length of the platform?

A378 m

B278 m

C356.5 m

D465 m

Answer:

D. 465 m

Read Explanation:

Let, the length of the platform = x metre Speed of the train = 57 km/hr = 57 × (5/18) m/s ⇒ (x + 152.5) = 39 × 57 × (5/18) ⇒ x + 152.5 = 617.5 ⇒ x = 617.5 - 152.5 ⇒ x = 465 m

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