SOLUTION: PLEASE HELP! A tanker is emptying its full 8000L tank at a rate of 3500 Lpm. A feeder hose is refilling the tank at 800 Lpm. How long will it take before the truck is empty?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: PLEASE HELP! A tanker is emptying its full 8000L tank at a rate of 3500 Lpm. A feeder hose is refilling the tank at 800 Lpm. How long will it take before the truck is empty?      Log On


   

Question 908005: PLEASE HELP!
A tanker is emptying its full 8000L tank at a rate of 3500 Lpm. A feeder hose is refilling the tank at 800 Lpm. How long will it take before the truck is empty?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
EMPTYING rate is greater than filling rate. Giving attention to emptying as if it were positive,

highlight%28%283500-800%29t=8000%29 according to uniform rates for a job, or a task, which here is to empty 8000 liters of whatever is in the tank. Solve for t minutes.