Two trains, each travelling with a speed of `37.5 kmh^(-1)` are approaching each other on the same straight track. A bird that can fly at `60 kmh^(-1)` flies off from one train when they are 90 km apart and heads directly for the other train. On reaching the other train, it flies back to the first and so on. total distance covered by the bird before trains collide is

Two trains, each travelling with a speed of 37.5kmh^(-1) are approaching each other on the same straingh track. A bird that can fly at 60 kmph flies off from one train when they are 90 km apart and heads directly for the other train. On reaching the other train, it flies back to the first and so on. total distance covered by the bird before trains collide is

Two trains, each having a speed of 30 km/h, are headed at each other on the same track. A bird that can fly 60 km/h flies off the front of on train when they are 60km apart and heads directly to the other train. On reaching the train, the bird flies back to the first train. What is the total distance the bird travels before the train collide?

Two trains, each with a speed of 50 kmph are headed towards each other on the same trake. A bird that can fly at the rate of 100kmph flies off one train when they are 100km apart and heads directly to the other train. On reaching the other train it flies back to the first train and so forth. (a) How many trips can the bird make from one train to the other before they crash ? (b) How is the total distance the bird travels ?

Two trains are headed towaads each other on the same straight rrach, each vaving a speed of 30 km h^(-1) . A bird that can fly at 60 km h^(-1) flies off one train when they are 60 km apart and leads firectly form the otjer train, On reaching the other train, tg flies back to the first train and so on. (a) How many trips can the bird make from one trin to the other train befre they meet ? (b) What is the total distance the bird travels ?

Two trains, each having a speed of 30 km//h , are headed towards each other

Train A and B are moving towards each other on the same track with velocities 40 km/hr and 20 km/hr respectivley. A sparrow which can fly at 30 km/hr flies off from train A when the train are 30 km apart. The sparrow directly moves towards the train 'B' and on reaching there flies back to 'A' and so on. Distance travelled by the sparrow till the two trains will hit is:

Two trains, each moving with a velocity of 30 ms^-1 , cross each other. One of the trains gives a whistle whose frequency is 600 Hz. If the speed of sound is 330 ms^-1 , the apparent frequency for passengers sitting in the other train before crossing would be