A spectator watches a rowing race from the edge of a river bank. The lead boat is moving in a straight line that is 90 ft from the river bank. If the boat is moving at a constant speed of 20 ft/sec, how fast is the boat moving away from the spectator when it is 400 ft past her?
A) 26.94 ft/sec
B) 17.28 ft/sec
C) 61.85 ft/sec
D) 19.51 ft/sec

Question

Quizplus · Accepted Answer

The Answer of A spectator watches a rowing race from the edge of a river bank. The lead boat is moving in a straight line that is 90 ft from the river bank. If the boat is moving at a constant speed of 20 ft/sec, how fast is the boat moving away from the spectator when it is 400 ft past her?
A) 26.94 ft/sec
B) 17.28 ft/sec
C) 61.85 ft/sec
D) 19.51 ft/sec

A Spectator Watches a Rowing Race from the Edge of a River