Discussion Forum



1)

A train 280 m long, running with a speed of 63 km/hr, will pass a tree in :


A) 15 sec

B) 16 sec

C) 18 sec

D) 20 sec

E) 25 sec

Answer:

Option B

Explanation:

Speed $=\left(63\times\frac{5}{18}\right)$ m/sec $=\frac{35}{2}$ m/sec.

Time taken $=\left(280\times\frac{2}{35}\right)$ sec = 16 sec.