SOLUTION: At 10am Danny is asked by his father to weed the garden. From past experience, Danny knows that this will take him 4 hours, working alone. His older brother Mike, when it is his tu
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-> SOLUTION: At 10am Danny is asked by his father to weed the garden. From past experience, Danny knows that this will take him 4 hours, working alone. His older brother Mike, when it is his tu
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Question 1160618: At 10am Danny is asked by his father to weed the garden. From past experience, Danny knows that this will take him 4 hours, working alone. His older brother Mike, when it is his turn to do this job, requires 6 hours. Since Mike wants to go golfing with Danny and has a reservation for 1 pm, he agrees to help Danny. Assuming no gain or loss of efficiency, when will they finish if they worked together? Can they make the golf date? Answer by ikleyn(52771) (Show Source):
Danny's rate of work is of the job per hour.
Mike's rate of work is of the job per hour.
Their combined rate of work is + = + = of the job per hour.
It means that they will complete a job in hours = 2 and hours = 2 hours and 24 minutes.
So, if they start at 10 am, they will complete the job at 24 minutes after noon.
