Question

A train 180 m long is running at a
speed of 42 km/hr. In what time it
crosses a man going at a speed of
6 km/hr in the same direction?
(a) 11 seconds (b) 21 seconds
(C) 23 seconds (d) 18 seconds​

Answer 1

Answer:

C) 12 sec.

Description for Correct answer:

Speed of the train 48 krnph

Walking speed of the man = 6 kmph.

Relative speed = (48+6) = 54 kmph = 54 × 5/18 = 15 m/sec.

The length of the train = 180 m.

The time taken by the train to pass the walking man = 180/15 = 12 sec.

Hope it helps you ｡◕‿◕｡

Please mark my answer brainliest (◠‿◕)

Answer 2

Answer:

Relative speed =42-6=36km/hr=36*5/18=10m/sec

Time taken by the train to cross a man=180/10=18 seconds