Flying against the wind, an airplane travels 2310 kilometers in 3 hours. Flying with the wind, the same plane travels 7350 kilom
eters in 7 hours. What is the rate of the plane in still air and what is the rate of the wind
1 answer:
Answer:
Distributes:
7R - 7S = 7490
9R + 9S = 11610
Multiplies the top equation by 9
and the bottom equation by 7
63R - 63S = 67410
63R + 63s = 81270
126R = 148680
R=1180
Plugs into original first equation
(R-S)*7 = 7490
(1180-s)*7 = 7490
1180 - s = 7490/7
1180 - s = 1070
-s = -110
s = 110
The speed of the plane in still air is 1180
The spped of the wind is 110
This is awfully fast.
Step-by-step explanation:
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