Question

The Thomas family went for a Sunday drive. Before they left, Mr. Thomas noticed the gas tank was ¾ full. When they returned home the gas tank was ⅓ full. If the gas tank holds 18 gallons, how many gallons of gas did the car use on the drive?

Answer 1

7.5 gallons

Explanation:

Given:

The Thomas family went for a Sunday drive.

Before they left, Mr. Thomas noticed the gas tank was ¾ full.

When they returned home the gas tank was ⅓ full.

Total capacity of the gas tank = 18 gallons

Question asked:

How many gallons of gas did the car use on the drive?

Solution:

Before they left, quantity of gas in the tank =
`(3)/(4) *18=(54)/(4) =13.5\ gallons`

When they returned, quantity of gas in the tank =
`(1)/(3) *18=(18)/(3) =6\ gallons`

Quantity of gas used on the drive = 13.5 - 6 = 7.5 gallons

Therefore, 7.5 gallons of gas used on the drive by Thomas family.