jwednesday
New member
- Joined
- Dec 10, 2009
- Messages
- 16
another word problem
A certain tank can be filled by one supply pipe in 3 hours and by a second supply pipe in 4 hours. The tank can be drained by its outlet pipe in 6 hours. The tank was emptied for repairs. When repairs were done both supply pipes began to fill the tank, but the drain valve was left open by mistake. How long would you expect it to take to fill the tank with the drain shut? How long will it actually take with the drain open?
Still I have trouble with the setup of this type of question
A certain tank can be filled by one supply pipe in 3 hours and by a second supply pipe in 4 hours. The tank can be drained by its outlet pipe in 6 hours. The tank was emptied for repairs. When repairs were done both supply pipes began to fill the tank, but the drain valve was left open by mistake. How long would you expect it to take to fill the tank with the drain shut? How long will it actually take with the drain open?
Still I have trouble with the setup of this type of question