Question

The tire of a car has a radius of 10.5 inches. How far will the car travel for 200 revolutions? Use
22/7 as an approximation for it.
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Answer 1

Answer:

The car will travel approximately 13200  inches

Step-by-step explanation:

Notice that in one revolution, the car travels exactly the length of the tire's circumference, that is: $2\,\pi\,R$

Then, in 200 revolutions the car will travel 200 times that amount:

$200\,(2\,\pi\,R)=400\ \pi\,R$

So for the given dimension of the tire, and using the approximation $(\pi\approx22/7)$, this distance would be:

$400\ \pi\,R=400\,\,\frac{22}{7} \,\,10.5\,\,in=13200\,\,in$