Question 275331
On a bus trip Frank is flying from new york to london,which are 3600 miles apart. 
With the wind current the flight there only takes 6 hours.
time = 6 hrs ; distance = 3600 miles ; rate = 3600/6 = 600 mph
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On the return trip the flight takes 8 hours against the wind.
time = 8 hrs ; distance = 3600 miles ; rate = 3600/8 = 450 mph
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Write and solve a system of linear equations to determine the airspeed and the wind speed.
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p + w = 600
p - w = 450
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Add to get:
2p = 1050
p = 525 mph (speed of the plane in still air)
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Substitute to solve for "w":
525 + w = 600
w = 75 mph (speed of the wind)
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Cheers,
Stan H.