John and sam have a lawn mowing service. at one home, john can mow the lawn by himself in 3 hours, but it takes sam 3.5 hours. how many hours t will it take them to mow the same lawn together? give the answer correct to one decimal place
Accepted Solution
A:
1/3+1/3.5=6.5/10.5 1/(6.5/10.5)=10.5/6.5 hours=1.65384 hours to mow the lawn working together ☺☺☺☺