Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 21 = 350 mis the reasoning for what question and answer pair?
Q: A train running at the speed of 60 km/hr crosses a pole in 21 sec. What is the length of the train?
Options:
(A) 350
(B) 150
(C) 277
(D) 258
(E) 191
A: (A)