The speed of a boat in still water is `8(km)/(hr)` . It can go 20 km upstream and return downstream to the engine point in 5 hours 20 minutes. Find the speed of the stream.

A motor boat whose speed is 18km/h in still water. It takes 1 hour more to go 24km upstream than to return downstream to the same spot. Find the speed of the stream.

Formulate the following problem as a pair of equations and then find their solutions. A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours it can go 40 km upstream and 55 km downstream. Determine the speed of the stream and that of the boat in still water.

formulate the following problem as a pair fo equations and then find their solution. A boat goes 28 km upsteam and 39 km downstream in 7 hours, In 8 hours it can go 21 km upstream and 65 downstream. Determine the speed of the stream and speed of the boart in still water.

Formulate the following problems as a pair of equations and then find their solutions. A boat goes 32 km upsteam and 60 km downstream in 9 hours. In 11 hours it can go 40 km upstream and 72 km downstream. Determine the speed of the stream and that of the boat in still water.

A boat which has a speed of 5 km hr^(-1) in still water crosses a river of width 1 km along the shortest possible path in 15 minutes. Calculate the velocity of the river water.

A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?