1.

11 т.2A train of 150 m length is going towards North ata speed of 10 m/s. A bird is flying at 5 m/s paralleto the track towards South. The time taken by thebird to cross the train is(1) 10 s(3) 30 S(2) 15 s(4) 12 s

Answer»

Since the parrot and the train are moving in the opposite direction

therefore parrot's relative velocity will be 5m/s + 10 m/s =15m/s

distance=speed*time

so 150=15*t

t=150/15 =10 sec



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