Question

A motorcycle can go 40 miles using one gallon of gas. About how many gallons of gas will be used to go 130 kilometers? (Note: 1 mile is approximately 1.6 kilometers.)

Answer 1

we were told that the motorcycle can go 40 miles using one gallon of gas. If mile is approximately 1.6 kilometers, it means that 40 miles would be

40 * 1.6 = 64 kilometers

let x represent the number of gallons that the motorcycle would use to travel 130 kilometers

If the motorcycle can go 64 kilometers with 1 gallon of gas, then then it can go 130 kilometers with x gallons. The equation would be

1 = 64

x = 130

By cross multiplying, it becomes

64 * x = 130 * 1

64x = 130

x = 130/64

x = 2.03 gallons

the motorcycle would use approximately 2 gallons of gas to travel 130 kilometers