Question 601627: jim mows a lawn in 5 hours.
tom mows the same lawn in 7 hours.
how long will both of them mow the same lawn? Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website! jim mows a lawn in 5 hours.
tom mows the same lawn in 7 hours.
how long will both of them mow the same lawn?
.
Let x = time (hours) for both
then
x(1/5 + 1/7) = 1
multiply both sides by common denominator of 35:
x(7 + 5) = 35
x(12) = 35
x = 35/12
x = 2.9167 hours
or
x = 2 hours and 55 minutes
