A boat has to cross a river. It crosses the river by making an angle of `60^(@)` with the bank of the river due to the stream of the river and travels a distance of 600m to reach the another side of the river. What is the width of the river?

A man crosses a river in a boat. If he crosses the river in minimum time he takes 10 min with a drift 120 m . If he crosses the river taking the shortest path, he takes 12.5 min. what is the width of the river ?

A man crosses a river in a boat. If he crosses the river in minimum time he takes 10 min with a drift 120 m . If he crosses the river taking the shortest path, he takes 12.5 min. What is the velocity of the boat in still water ?

Answer any One question : From a quay of a river, 600 metres wide, two boats start in two different directions to reach the opposite side of the river. The first boat moves making an angle of 30^@ with this bank and the second moves making an angle 90^@ with direction of the first boat. What will be the distance between the two boats when both of them reach the other side?

What is the source of the heat that is needed for the water in the ponds near your house or the river to change in the same way?

The width of a river is D. A man can cross the river in time t_1 in the absence of any river current. But in presence of a certain river current, the man takes a time t_2 to cross the river directly. Show that the velocity of the current is v=D sqrt((1)/(t_1^2)-(1)/(t_2^2))

A palm tree stands on the bank of a river. A post is fixed I the earth on the other bank just opposite to the palm tree. On moving 7sqrt3 metres from the post laong the bank, it is found the tree makes an angle of 60^2 at that point with respect to this bank. Find the width of the river.

Water of river Ganges remains 'pure' due to presence of

A bridge is situted at right-angle to the bank of a river. If one moves away a certain distance from the bridge along this side of the river, the other of the bridge is seen at an angle of 45^(@) and if someone moves a further distance of 400 metres in the same direction, the other end is seen at an angle of 30^(@) . Find the length of the bridge.