Question

. A 160 m long train is moving north at a

speed of 15 m/s. A bird flying south at a

speed of 5 m/s crosses the train. The time

taken by the bird to cross the train is

(a) 8 s (b) 11.2 s

(c) 15.8 s (d) 56 s​

Answer 1

Answer:

Explanation:

Speed of train = 15m/s

Speed of bird = 5m/s

Train and bird are moving in opposite directions

So speed of bird relative to train = 15+5 += 20m/s

time taken to cross train (t) = 160/20 = 8s

the answer is (a) 8s