Question

a tank contains 20 gallons of water, the tap is opened and more water is allowed in the tank at 5 gallsons per min for 20 min calculate the amount of what inside the tank after 20 min

Answer 1

Answer: 120 gallons

Work Shown:

x = number of minutes

5x = amount of water added

5x+20 = total amount of water

Plug in x = 20 to find that:

5x+20 = 5*20+20 = 120 gallons of water is in the tank after 20 minutes.