question_answer

A train of 150 m length is going towards north direction at a speed of \[10\,\text{m}{{\text{s}}^{-1}}.\] A parrot flies at a speed of \[\text{5}\,\text{m}{{\text{s}}^{-1}}\] towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

A)  12s                       

B)  8 s

C)  15s                                       

D)  10 s