Question 1207433
<br>
The cold water tap, filling the sink at the rate of 4 liters per minute, is on for 3+2=5 minutes, putting 4*5=20 liters of water in the sink.<br>
The hot water tap, filling the sink at the rate of 3 liters per minute, is on for 2 minutes, putting 3*2=6 liters of water in the sink.<br>
So a total of 20+6=26 liters of water was put into the tank.<br>
The drain empties the tank at the rate of 2 liters per minutes; the amount of time it takes to drain 26 liters is 26/2 = 13 minutes.<br>
The drain is open for the 5 minutes while the taps are putting water into the sink; the number of minutes it takes to empty the sink after the taps are turned off is 13-5=8.<br>
ANSWER: 8 minutes<br>