A man is boat intends to cross river from A. If he rows perpendicular to the banks then he takes `t_1` = 10 minutes to reach the other bank and he reaches point C at a distance l = 120 m down the stream from the point B which is exactly opposite to A on the other bank. If he heads at a certain angle `alpha` to the straight path AB against the current he will reach point B in `t_2` = 12.5 minutes.

The width of river is-

A man swims from a point A on the bank of a river if width 100 m . When he swims perpendicular to the water current, he reaches the other bank 50 m downstream. The angle to the bank at which he should swim, to reach the directly opposite point B on the other bank is. .

A man in a boat crosses a river from point A. If he rows perpendicular to the banks he reaches point C (BC = 120 m) in 10 min. If the man heads at a certain angle alpha to the straight line AB (AB is perpendicular to the banks) against the current he reaches point B in 12.5 min. Find the width of the river w, the rowing velocity u, the speed of the river current v and the angle alpha . Assume the velocity of the boat relative to water to be constant and the same magnitude in both cases.

A man in a boat crosses a river from point A. If he rows perpendicular to the banks he reaches point C (BC = 120 m) in 10 min. If the man heads at a certain angle alpha to the straight line AB (AB is perpendicular to the banks) against the current he reaches point B in 12.5 min. Find the width of the river w, the rowing velocity u, the speed of the river current v and the angle alpha . Assume the velocity of the boat relative to water to be constant and the same magnitude in both cases.

A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank. If the river is flowing at a speed of 3 kmph, he has to swim in the direction

A man can swim in still water at a speed of 6 kmph and he has to cross the river and reach just opposite point on the other bank. If the river is flowing at a speed of 3 kmph, he has to swim in the direction