A train 630 m long, running with a speed of 63 km/hr will pass a tree in? Choose the correct choice from the following answers
A) 35
B) 36
C) 37
D) 38
E) 39

Rationale: "speed = 63 * 5 / 18 = 35 / 2 m / sec time taken = 630 * 2 / 35 = 36 sec answer : option b"
Answer: B