Concept explainers
To Find: To find the speed of the plane and the speed of the air from the given information.
Answer to Problem 74E
The speed of aeroplane and wind is 550 and 50 miles per hour.
Explanation of Solution
Given information:Given distance and time taken by the aeroplane
Formula used: Elimination method
Calculation:
Let the speed of the aeroplane be xmiles /hour and the speed of the wind be ymiles /hour.
Speed tailwind
But, speed headwind
And, speed tailwind
According to question
Subtracting these equations
Also, adding (1) and (2),
Thus, the speed of aeroplane is 550 miles/hour and the speed of wind is 50 miles/hour.
Chapter 7 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
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