Question

If gas costs $1.35 per gallon, what is the cost to fill a 20-gallon tank?

Answer 1

Cost to fill a 20 gallon tank is `color(purple)($27.00`

Explanation:

Cost of one gallon of gas `= $1.35`

Cost of 20 gallons of gas `= 1.35 * 20 = $27.00`

Cost to fill a 20 gallon tank is `color(purple)($27.00`

Answer 2

$ `27`

Explanation:

The cost of gas per gallon is $`1.35`.

Hence the cost of `20` gallons of gas

`=20\times 1.35`

`=27`

Hence the cost of filling a `20`-gallon tank is $`27`