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