A pump can fill your pool in 10 hours. Another pump can fill it in 15 hours. How long would it take if both pumps work together?
Filling your pool
#1
Filling your pool
Posts
Re: Filling your pool
Solution #2
1 1 3 2 5 1 -- + -- = -- + -- = -- = - 10 15 30 30 30 6
6 hours
Re: Filling your pool
#3
@Visman, We have a winner! 
