Question

Robert was able to travel 292 miles in 4 hours and uses 38 l of gasoline. if gas costs $2.09 per gallon, how much did the trip cost robert? (1 gal≈3.785 l).

Answer 1

Robert´s trip cost $20.98.

Explanation:

Robert use 38 liters of gas to make his 292 miles trip. The gallon of gas cost is $2.09. First we have to convert the 38 liters of gas to gallons.

`38 liters*(1 gallon)/(3.785 liters) =10.04 gallons`

Having convert the units, we can calculate how much cost the gas, this is:

`10.04gallons*2.09=20.98`

Robert´s trip cost $20.98.

The distance and time data is used to confuse.

Answer 2

cost of 1 gallon gas = $2.09

cost of 3.785 litres gas = $2.09 ( 1 gallon = 3.785 litres)

cost of 1 litre gas = 2.09/3.785

cost of 18 litres gas = 2.09/3.785 * 18 = $20.982