Question

Ross has to fill up a 300 gallon tank. There are already 75

gallons of water in the tank, and the pump Ross uses can fill
25 gallons of water per hour. How many hours does he need
to finish the task?
hours​

Answer 1

Answer: He needs 9 hours to finish the task.

Explanation:

Hi, first we have to subtract the gallons of water already in the tank (75) to the total capacity of the tank (300).

300-75 = 225

He needs to fill 225 gallons.

Since the pump Ross uses can fill 25 gallons of water per hour, the proportion is :

25 g / 1h

For 225 gallons:

225 g / x hours

Solving for x

25/1 = 225/x

x= 225/ (25/1)

x = 9 hours