waecmaths question:
The diameter of a bicycle wheel is 42cm. If the wheel makes 16 completes revolutions, what will be the total distance covered by the wheels (Take$\pi =\tfrac{22}{7}$)
Option A:
672cm
Option B:
1056cm
Option C:
2112cm
Option D:
4224cm
waecmaths solution:
$\begin{align} & Perimeter\text{ }of\text{ }the\text{ }circle=\pi d=\tfrac{22}{7}\times 42cm=132cm \\ & \text{Total distance in 16 completes revolution is }16\times 132cm=2112cm \\\end{align}$
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