A boatman trying to cross the river.the width of the river is 400m.he is selling boat with 10m/sec.he takes 50sec to cross the river due to flow of water.calculate the drift. Choose the correct choice from the following answers: A) 500 B) 400 C) 300 D) 200 E) 100

Rationale: the distance boatman travel to cross the river = 50 * 10 = 500 m he sell the boat diagonally . so height = 400 m , base be x and hypotenuse = 500 m so by pythagoras theorem , square of 400 + square of x = square of 500 so , square of x = 250000 - 160000 x = â ˆ š 250000 - 160000 , x = â ˆ š 90000 = 300 drift = 300 m answer c
Answer: C