Jason can wash and wax his car in 4 hours. His sister does the same thing in 6 hours. If they work together how fast can they wash and wax the car?

Question

25-03-2015
Mathematics

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Jason can wash and wax his car in 4 hours. His sister does the same thing in 6 hours. If they work together how fast can they wash and wax the car?

Sagot :

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