Billy drives 171 miles in 3 hours, so he could drive 256.5 miles in 4.5 hours.
The distance covered by the particle or the body in an hour is called speed. It is a scalar quantity. It is the ratio of distance to time.
We know that the speed formula
Speed = Distance/Time
The number of miles driven varies directly with the number of hours in the car.
Billy drives 171 miles in 3 hours.
Then the number of miles he can drive in 4.5 hours will be
Let x be the number of miles covered in 4.5 hours.
The speed remains constant.
Then we have
x / 4.5 = 171 / 3
x = 256.5 miles
More about the speed link is given below.
https://brainly.com/question/7359669
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