Question

How much gas was used up (gallons):

• A.
  1. 10 gallons
  2. 15 gallons
• B.
  1. 15 gallons
  2. 10 gallons
• C.
  1. 10 gallons
  2. 10 gallons
• D.
  1. 15 gallons
  2. 15 gallons

Answer 1

The correct option is A

1. 10 gallons
2. 15 gallons

Before the first refill we can see that there was 5 gallons of gasoline left in the tank when the car started with 15 in the beginning.

Hence, 15 - 5 = 10 gallons of gasoline was used up.

Between the two refills, we can see that the gasoline level in the tank has dropped from 30 to 15 which means that 30 - 15 = 15 gallons of gasoline was used up.