Question

A 480 m long train crosses a standing object in 12 seconds. Find the time taken by the train to cross a long wall of length 325 m.

Answer 1

Answer:

20 seconds

Step-by-step explanation:

Length of the train = 480 m

Time taken to cross an object = 12 seconds.

Speed of the train = Length of the train / Time taken to cross an object = 480/12 m/sec = 40 m/sec.

Length of the wall = 325 m

Time taken to cross the wall = (Length of the train + Length of the wall) / Speed of the train

= (480 + 325 m)/40 seconds = 805/40 = 20.12 seconds

Hence the answer is 20 seconds.