A man can swim with a speed of `4.0 km//h` in still water. How long does he take to cross a river 1.0 km wide if the river flows steadily at `3.0 km//h` and he makes his strokes normal to the river current? How far down the river does he go when he reaches the other bank ?

A man rowing at the rate of 5 km per hour in still water takes thrice, as much time in going 40 km up the river as in going 40 km down. Find the rate at which the river flows.

If a driver drives at the rate of 32 km/h, he reaches his destinatin 7 minutes late. If the drives at the rate of 35km/h he reaches 4 minutes earlier. How far is his destination?

A river 3 m deep and 40 m wide is flowing at the rate of 2 km per hour. How much water will fall into the sea in a minute?

A cyclist is riding with a speed of 27 km//h . As he approaches a circular turn on the road of radius 80 m, he applies brakes and reduces his speed at the constant rate of 0.50 m//s every second. What is the magnitude and direction of the net acceleration of the cyclist on the circular turn ?

A man would be 5 minutes late to reach his destination if he rides his bike at 30 km per hour.But he would be 10 minutes early if he rides at the speed of 40 km per hour.What is the distance of his destination from where he starts?