SOLUTION: A cargo plane flew from the US across the Atlantic at two hundred mph,and flew back to the US at two hundred twenty mph. Given that the first trip took two hours longer how long wa

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Question 907995: A cargo plane flew from the US across the Atlantic at two hundred mph,and flew back to the US at two hundred twenty mph. Given that the first trip took two hours longer how long was the return trip>
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
200(x+2)=220x
200x+400=220x
400=20x
x=20 hours