Question

Bill can mow the lawn in 2 hours, and his younger brother Tom can mow it in 3 hours. If both brothers mow the lawn together, how many hours will it take them?

Answer 1

1 hour 12 minutes

(the simplified version of the answer above)

Answer 2

We have a work problem right here. We can use knowledge on ration and proportion to answer this type of problem. We do as follows:


1 job / 2 hours + 1 job / 3 hours = 1 job / time it takes for both when working together

time it takes for both when working together = 1.2 hours