# SOLUTION: A 5 horsepower pump can empty a pool in 5 hours. A smaller 2 horsepower pump empties the same pool in 8 hours. The pumps are used together to begin emptying this pool. After 2 hour

Algebra ->  Algebra  -> Customizable Word Problem Solvers  -> Travel -> SOLUTION: A 5 horsepower pump can empty a pool in 5 hours. A smaller 2 horsepower pump empties the same pool in 8 hours. The pumps are used together to begin emptying this pool. After 2 hour      Log On

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 Click here to see ALL problems on Travel Word Problems Question 5399: A 5 horsepower pump can empty a pool in 5 hours. A smaller 2 horsepower pump empties the same pool in 8 hours. The pumps are used together to begin emptying this pool. After 2 hours the 2 horsepower pump breaks down. How long will it take the 5 horsepower pump to empty the pool?Answer by Abbey(339)   (Show Source): You can put this solution on YOUR website!Let's break this down by work: Let = the work that the 5 hp pump does each hour (If it can do the whole job in 5 hours, it is doing of the job each hour Let = the work that the 2 hp pump does each hour. Working together they do = or of the job each hour So in 2 hours, they have completed This means that there is only of the job left to do. we know that the rate of work * time = amount of work completed so: multiply both sides by 5: or 1 and 3/4 hours.