In 36 seconds, a train passes a station platform, while a man standing on the platform takes 20 seconds. What is the length of the platform if the train is travelling at 54 km/h?
A. 120 m
B. 240 m
C. 300 m
D. None of these
Answer:B
In 36 seconds, a train passes a station platform, while a man standing on the platform takes 20 seconds. What is the length of the platform if the train is travelling at 54 km/h?
A. 120 m B. 240 m C. 300 m D. None of these
Explanation: 54 m/sec x 5/18 m/sec = 15 m/sec.The train's length is calculated as (15 x 20)m = 300 m.Let the platform's length be x metres.After that, x + 300/36 = 15, 540 = x + 300,x = 240 metres