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How long do a son and father working together take to dig a garden 7 feet long and 5 feet wide if the father alone can do it in 3 hours and the son alone in 4 hours?
Wiki User
∙ 7y ago
The dimensions of the garden are irrelevant to the solution
In 1 hour the father can dig 1/3 of the garden, and the son can dig 1/4 of the garden
Together in 1 hour they can dig 1/3 + 1/4 = 4/12 + 3/12 = 7/12 of the garden
The whole garden will take 1 ÷ 7/12 hours = 12/7 hours = 1 5/7 hours = 1 hr 42 6/7 mins
They will take slightly less than 1¾ hours to dig the garden together.
Wiki User
∙ 7y ago
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A father and son are digging a garden that is 7 feet long and 5 feet wide The father working alone can dig the garden in 3 hours The son can do the job in 4 hours If they both work together how?
1.7 hours
A father and son are digging a garden that is 7 feet long and 5 feet wide The father, working alone, can dig the garden in 3 hours The son can do the job in 4 hours If they both work together, how?
12/7 hours.
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