A river is wide and flows due east at

PHYSICS · Single correct · CBSE · Physics · Motion in a Plane · Motion in a Plane

Problem

A river is

300\,\text{m}

wide and flows due east at

3\,\text{m}\,\text{s}^{-1}

. A boat can travel at

5\,\text{m}\,\text{s}^{-1}

in still water and is aimed due north. How long will it take the boat to reach the opposite bank? (a)

70\,\text{s}

(b)

60\,\text{s}

(c)

50\,\text{s}

(d)

100\,\text{s}