Consider the question. A train 250 m long running at 72 kmph crosses a platform in 15 sec. What is the length of the platform?
Options:
(A) 50m
(B) 200m
(C) 250m
(D) 270m
(E) 300 m
 What is the step-by-step reasoning process to arrive at the answer: (A)?
user
D = 72 * 5/18 = 15 = 300 â€“ 250 = 50m
assistant