Question

A river flows due south at 1.2 mi/h. In what direction should the swimmer head, at a velocity of 2 mi/h, in order to arrive at a landing point due east of his starting point? (Round your answer to one decimal place.)

Answer 1

he must cancel the river pulling south 1.2 mi/h.

so he must swim so that the N/S component is 1.2 mi/h to the north