A launch travels across a river from a point `A` to a point `B` of the opposite bank along the line
Channel: Doubtnut
Date: 26/07/2020

A launch travels across a river from a point `A` to a point `B` of the opposite bank along the line `AB` forming angle `prop` with the bank. The flag on the mast of the launch makes an angle `beta` with its direction of motion. Determine the speed of the launch w.r.t. the bank. The velocity of wind is `u` perpendicular to the stream.