SOLUTION: mark can mow a lawn in 20 minutes less time than his sister Marie. Together they can mown the lown in 24 minutes. How long it will take Marie to finish the mowing if she works alon
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-> SOLUTION: mark can mow a lawn in 20 minutes less time than his sister Marie. Together they can mown the lown in 24 minutes. How long it will take Marie to finish the mowing if she works alon
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Question 902125: mark can mow a lawn in 20 minutes less time than his sister Marie. Together they can mown the lown in 24 minutes. How long it will take Marie to finish the mowing if she works alone? Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! |Multiplying thru by 24x(x-20) so as all denominators = 1
24x + 24(x-20) = x(x-20)
x^2 -68x + 480 = 0 (Tossing out erroneous solution)
(x-60)(x-8) = 0
x = 60min
