Question

A train crosses a bridge which is 120 m long in 14 seconds and the same train crosses a static pole in 8 seconds. Find the length and the speed of the train.

• A. 162 m, 12 m/sec.
• B. 160 m, 20 m/sec.
• C. 112 m, 26 m/sec.
• D. 119 m, 21 m/sec.

Answer 1

Answer:

B. 160 m, 20 m/sec.

Let the length of the train be x metres. ⇒ x/8 = (120 + x)/14 ⇒ 14x = 960 + 8x ⇒ 6x = 960 x = 160 m Speed of the train = Distance/Time = 160/8 = 20 m/sec.