A train 175 m long, running with a speed of 63 km/hr will pass a tree in?  Choose the correct choice from the following answers.
A) 22 sec  B) 16 sec  C) 17 sec  D) 88 sec  E) 10 sec

Rationale: "speed = 63 * 5 / 18 = 35 / 2 m / sec time taken = 175 * 2 / 35 = 10 sec answer : e"
Answer: E