1/x = 1/60 + 1/55
x = 660/223
So, it will take them about 28.7 minutes.
Sounds right, since their times are so close, it would just about cut the time in half, working together.
James can detail a car by himself in 60 minutes. Manny does the same job in 55 minutes. How long will it take them to detail a car working together
1 answer
1 answer