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Solve the Problem 21mph21 \mathrm{mph} , What Is the Speed of the Plane in Still

Question 76

Multiple Choice

Solve the problem.
-A plane flies 500 miles with the wind and 300 miles against the wind in the same length of time. If the speed of the wind is 21mph21 \mathrm{mph} , what is the speed of the plane in still air?


A) 89mph89 \mathrm{mph}
B) 109mph109 \mathrm{mph}
C) 74mph74 \mathrm{mph}
D) 84mph84 \mathrm{mph}

Correct Answer:

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