Question

Driving to the airport, the Smiths needed to fill up on gasoline. Gasoline costs 3 dollars for one gallon. If their tank holds 16 gallons, and they already have 3 gallons filled, how much money will it cost to fill the car's tank completely?

1.$45
2.$48
3.$51
4.$54

Answer 1

It will cost $39 to fill the car's tank completely.

Step-by-step explanation:

To calculate the cost of filling the car's tank completely, we need to find the number of gallons needed to fill the remaining portion of the tank and then multiply it by the cost per gallon.

The tank holds 16 gallons, and 3 gallons are already filled. Therefore, the remaining portion of the tank is 16 - 3 = 13 gallons.

Since the cost of gasoline is $3 per gallon, the total cost to fill the car's tank completely is 13 x $3 = $39.