Two friends

Peter can do all his work himself in 6 hours. Martin can do the same work himself in 8 hours. Peter worked first and was then replaced by Martin. The whole work was done in 6.5 hours. Calculate how long Peter worked before being replaced by Martin.

Correct answer:

p =  4.5 h

Step-by-step explanation:

P=6 h M=8 h t=6.5 h  p/P+(tp)/M=1 p/6+(6.5p)/8=1  p=4.5  p=14.5=4.5  p=29=4.5=29 h=4.5 h



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