Kinematics Question 385

Question: A train of 150 m length it’s going towards north direction at a speed of $ 10m{{s}^{-1}} $ . A parrot flies at a speed of $ 5m{{s}^{-1}} $ towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

Options:

A) 12s

B) 8s

C) 15s

D) 16s

Show Answer

Answer:

Correct Answer: D

Solution:

The velocity of parrot w.r.t. train it’s S $ =5-(-10)15m/sec $

so time taken to cross the train it’s = $ \frac{\text{length of train}}{\text{relative velocity}}=\frac{150}{15}=10\text{ sec} $



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