Answer:
Speed of plane in still air = 162 km/h
Speed of wind = 21 km/h
Step-by-step explanation:
Flying with the wind a plane went 183 km/h. Flying into the same wind the plane only went 141km/h. Find the speed of the plane in still air and the speed of the wind.
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Let plane speed in still are be "p".
Let wind speed be "w"
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Equations:
p + w = 183 km/h
p - w = 141 km/h
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Add and solve for "p":
2p = 323
plane speed in still air = 161.5 km/hr
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Solve for "w":
p + w = 183
161.5 + w = 183
wind speed = 21.5 km/hr
