SOLUTION: a water tank is connected to two pumps. it takes 40 mins to fill the water tank from the pump at the top, and 60 mins to empty it using the pump at the bottom. if we pump water at

Algebra ->  Rate-of-work-word-problems -> SOLUTION: a water tank is connected to two pumps. it takes 40 mins to fill the water tank from the pump at the top, and 60 mins to empty it using the pump at the bottom. if we pump water at       Log On


   



Question 521376: a water tank is connected to two pumps. it takes 40 mins to fill the water tank from the pump at the top, and 60 mins to empty it using the pump at the bottom. if we pump water at the same time as pumping water out, what fraction of the tank will be filled in 1 minute?
Answer by lwsshak3(11628) About Me  (Show Source):
You can put this solution on YOUR website!
a water tank is connected to two pumps. it takes 40 mins to fill the water tank from the pump at the top, and 60 mins to empty it using the pump at the bottom. if we pump water at the same time as pumping water out, what fraction of the tank will be filled in 1 minute?
**
1/40=rate of fill pump
1/60=rate of drain pump
After 1 minute:
1/40-1/60=3/120-2/120=1/120
ans:
1/120 of the tank will be filled after one minute