Question

John’s car gets 20 miles per gallon when driving in the city. He drives 25 miles every day, five days a week. The gas costs $2.60 gallon. Find the weekly cost for the gas for Johns commute to work

Answer 1

Given:

Mileage of car, m=20 miles/gallon

Driving distance per day=25 miles.

Driving 5 days per week,

d=25*5

d=125 miles

Cost of gar per gallon=$2.60

The objectiv is to find the cost of gas per week.

Since his car can run 20 miles per gallon.

Then the required gallon to complete 125 miles is,

`\begin{gathered} x=\frac{Total\text{ distance}}{miles\text{ per gallon}} \\ x=(125)/(20) \\ x=6.25\text{ gallon} \end{gathered}`

Thus the required gallon of gas is 6.25.

Let's take the total cost as C.

Then the required formula to find the total cost per week is,

`\begin{gathered} C=\text{Cost of gas per gallon}\cdot\text{required gallon for a w}ek \\ C=2.60\cdot6.25 \\ C=16.25 \end{gathered}`

Hence, the cost of the fuel for 5 days in a week is $16.25.