SOLUTION: An automobile travels the 150-mile distance between two towns in 2 1/2 hours. An airplane travels 4 times as fast as the auto. What is the speed of the airplane in miles per hour?

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Question 615181: An automobile travels the 150-mile distance between two towns in 2 1/2 hours. An airplane travels 4 times as fast as the auto. What is the speed of the airplane in miles per hour?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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An automobile travels the 150-mile distance between two towns in 2 1/2 hours. An airplane travels 4 times as fast as the auto. What is the speed of the airplane in miles per hour?
:
Find the speed of the car: s = dist/time
s = 150%2F2.5
s = 60 mph
:
"An airplane travels 4 times as fast as the auto. "
Find the speed of the plane
4 * 60 = 240 mph