Discussion
If the radius of a wheel is 14 cm, the number of revolutions it makes in covering a distance of 1056 cm is?
Answer: D
Each revolution advances the wheel by one circumference.
\[ C = 2\pi r = 2 \times \frac{22}{7} \times 14 = 88 \text{ cm} \]
\[ n = \frac{1056}{88} = 12 \]
A radius that is a multiple of 7 makes the \( \tfrac{22}{7} \) cancel exactly, which is why the circumference lands on a whole 88 cm.
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