To find the circumference of a circle (or tire in this case), you can use the formula:
\[ C = \pi \times d \]
where \(C\) is the circumference and \(d\) is the diameter.
Given that the diameter of the tires is 20 inches, we can substitute this value into the formula:
\[ C = \pi \times 20 \]
Using the approximation of \(\pi \approx 3.14\):
\[ C \approx 3.14 \times 20 = 62.8 \text{ inches} \]
Therefore, the circumference of the tires is approximately 62.8 inches.
The correct answer is:
B. 62.8 inches