Question

A tractor tire has a radius of 28 inches. If the tire is rotating at 80 degrees per second (i.e. it takes 9/2 seconds to make one revolution), how fast is the tractor traveling in miles per hour? Round your answer to the nearest 0.01 mph. Do not include units in your answer.

Answer 1

The speed of the tractor's tire by means of the information given is; 547.06.

How fast is the tractor moving?

According to the task content;

• It follows that the radius of the tire is; 28 inches and the period taken for one revolution is; 4.5s.

On this note, the speed of the tractor is;

Speed = (πr²) ÷ 4.5

Speed = (3.14×28²)/4.5

Speed = 547.06

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