# Three pumps can remove a total of 1700 gallons of water per minute from a flooded mineshaft. If engineers want to remove at least 5500 gallons per minute, how many pumps will they need operating?

##### 1 Answer

Jan 11, 2018

#### Explanation:

First, write an equation and solve to find how many gallons of water per minute each pump removes:

G stands for the gallons of water that one pump can remove per minute.

Then, write an equation and solve to find how many pumps are needed to remove at least 5500 gallons per minute:

G = gallons of water per minute per pump

P = number of pumps

Since 9.71 pumps would pump 5500 gallons per minute, and you cannot have a fraction of a pump. round up to 10 pumps.

Finally, check your answer: