Two boats are traveling towards each other in a stream.
They both can travel at 30 kmph in still water. If they are
300 km apart how long will it take them to cross each other
if the speed of the stream is 5 kmph?

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 ?

The speed of a boat in still water is 10 km/hr. If it can travel 26 km downstream and 14 km upstream in the same time, find the speed of the stream.

The speed of a boat in still water is 12 kmph . If the boat covers 36 km upstream in 4 hours , what is the speed of stream ?

Two trains 240 metres and 270 metres in length are running towards each other on parallel lines,one at the rate of 60kmph and another at 48kmph .How much time will they take to cross each other?