A river 100 m wide flows due south. A boat that goes 1 m/s relative to the water is pointed due east as it crosses from the west bank. The boat crosses in
A)50 s.
B)100 s.
C)141 s.
D)200 s.

Question

Quizplus · Accepted Answer

The boat's speed relative to the water is 1 m/s, and it is pointed due east. Since the river is 100 m wide, it will take 100 seconds to cross the river, as the eastward speed is 1 m/s.

A River 100 M Wide Flows Due South