Question

Bryan is taking a road trip to Dallas, Texas. His car can travel 315 miles with 18 gallons of gas. Bryan's s car holds 20 gallons of gas. Suppose Bryan's gas gauge indicates that he has one-fourth tank of gas left, how many more miles can Bryan travel before he runs out of gas?

Answer 1

1) Find the unit rate
315÷18=17.5
2) See how many miles he can go on a full tank of gas
17.5×20=350
3) Find how much gas total is in the tank
$\frac{20}{4}$ =5 gallons
4) Find how many miles he has left before his tank is empty
17.5×5=87.5


He has 87.5 miles left to go before he runs out of gas.

Answer 2

Answer:

$87.5$ miles

Step-by-step explanation:

Distance traveled in $18$ gallons of gas $= 315 miles$

Distance traveled in $1$ gallon of gas $= 17.5 miles$

Gas left in the tank as indicated by Bryan's gas gauge

$= \frac{1}{4} * 20\\= 5$ gallons

Distance traveled in remaining $5$ gallons of gas

$= 5 * 17.5\\= 87.5$ miles