Solve the problem.
-A helicopter flies 168 miles against the wind in 2 hours; with the wind, it can fly 252 miles in the same amount of time. Find the speed of the helicopter in still air.
A) 21 miles per hour
B) 63 miles per hour
C) 105 miles per hour
D) 84 miles per hour

Question

Quizplus · Accepted Answer

The speed of the helicopter in still air is the average of its speed with and against the wind. Speed against the wind = 168 miles / 2 hours = 84 mph, speed with the wind = 252 miles / 2 hours = 126 mph. Average speed = (84 mph + 126 mph) / 2 = 105 mph.

Solve the Problem. -A Helicopter Flies 168 Miles Against the Wind in 2