Question

An 18-wheeler truck has an average diesel fuel mileage of 7 mpg. The truck has two tanks, each of which holds 140 gallons of diesel fuel. Diesel fuel costs $3.971 per gallon. How far can the truck travel on two full tanks of diesel fuel, and what is the total cost of filling the two tanks? The truck can travel A miles on two full tanks of diesel fuel. The total cost of filling the two tanks is $ B .

Answer 1

The truck can travel 1960 miles on two full tanks of diesel fuel. The total cost of filling the two tanks is $ 1111.88 .

Explanation:

Given:

Average diesel fuel mileage of truck = 7 mpg

Amount of fuel held by a tank of truck = 140 gallons

Cost of diesel fuel per gallon= $3.971

Since the truck has 2 tanks for fuel,

Total amount of fuel filled in the truck =
`140* 2=280\ gallons`

∴ The distance the truck can travel with 280 gallons of fuel =
`mileage * fuel(in\ gallons) = 7* 280 = 1960\ miles`

∴Cost of 280 gallons of fuel =
`\textrm{unit rate of fuel in \$} * 280\ gallons= \$3.971* 280 =\$ 1111.88`

A=1960 miles

B=$ 1111.88