Question

The curtis car traveled an average of 21 miles per gallon of gas. At that rate, how far could the car travel on a full tank of 21 gallons

Answer 1

Rate = 21 miles per gallon.
No. of gallons = 21

Distance = Rate x  No. of Gallons

= 21 x 21

= 441

Thus, the curtis car can travel 441 miles at the rate of 21 miles per gallon

Answer 2

(21 miles/gallon) x (21 gallons) = 21 x 21 = 441 miles