Wheel diameter

A 1m diameter wheel rolled along a 100m long track. How many times did it turn?

Correct answer:

n =  31.831

Step-by-step explanation:

$$\begin{gathered} D=1\text{ m } \\ o=\pi \cdot D=3.1416\cdot 1\doteq 3.1416\text{ m } \\ s=100\text{ m } \\ n=s\mathrm{/}o=100\mathrm{/}3.1416=31.831 \end{gathered}$$

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