Solve the problem.A plane makes a 240-mile trip against a head wind in 1 hour and 30 minutes and returns, with a tail wind of the same speed, in 1 hour. What is the speed of the wind?
A. 80 mph
B. 160 mph
C. 40 mph
D. 200 mph
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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