Set these up as ratios of minutes : proportion of pool filled...
So that means, if they did it together, every minute they would fill of the pool. Therefore they would fill it in 15 minutes.
Q15: Jamil can fill a pool carrying buckets of water in 30 minutes. Ali can do
the same job in 45 minutes. Tariq can do the same job in 1 ½ hours.
How quickly can all three fill the pool together?
A. 12 minutesB. 15 minutesC. 21 minutesD. 23 minutes