Mauricio wants to fry 18 potatoes per hour for 3.5 hours.

he can fry 6 potatoes using each gallon of oil.

how many gallons of oil does mauricio need for frying potatoes?
choose from one of the following options.

Hello mate!

Mauricio wants to fry 18 potatoes per hour for 3.5 hours, this means that the total amount of potatoes he fries is equal to:

18*3.5 = 63

Now we know that he can fry 6 potatoes using a gallon of oil, now how many gallons of oil are needed to fry 63 potatoes?

this is:

N = 63/6 = 10.5 gallons, or 11 gallons rounding up

So Mauricio needs 11 gallons of oil if he wants to fry 18 potatoes per hour for 3.5 hours.