A train $100 \mathrm{m}$ long is running at the speed of $65 \mathrm{km}/\mathrm{hr}$. Time taken by the train to pass through a man walking at the rate of $5 \mathrm{km}/\mathrm{hr}$ in the direction of the train is:

A train $100 \mathrm{m}$ long is running at the rate of $55 \mathrm{km}/\mathrm{hr}$. Time taken by the train to pass through a man walking at the rate of $5 \mathrm{km}/\mathrm{hr}$ moving in opposite direction is:

Two people start from the same place and walk in the opposite directions at 5 km per hour and 4 km per hour respectively. At the end of 3 hours, distance between them is:

A person starts from a place P at 6 A.M. and walks to Q at 3 km per hour. Another person starts from P at 8 A.M. and follows the first on bicycle at 6 km per hour. Both of them reach Q at the same time. The distance from P to Q is:

A person can row at the rates of x km/hr up the stream and at the rate of y km/hr down the stream. The rate in still water is:

A person can row at the rates of x km/hr up the stream and at the rate of y km/hr down the stream, the rate of flow of stream is:

A person can row down the stream at 6 km/hr and up the same stream at 3 km/hr. His rate in still water is:

A person can row down the stream at 6 km/hr and up the same stream at 3 km/hr, the rate of flow of the stream is:

A man can row at the rate of 9 km per hour in still water. At what rate can he row against a stream flowing 7 km per hour?