waecmaths question:
The height of a cylinder is equal to its radius. If the volume is 0.216π m3. Calcualte the radius
Option A:
0.46m
Option B:
0.60m
Option C:
0.87m
Option D:
1.80m
waecmaths solution:
$\begin{align} & V=\pi {{r}^{2}}h \\ & \pi {{r}^{2}}r=0.216\pi c{{m}^{3}} \\ & {{r}^{3}}=\frac{216}{1000}c{{m}^{3}} \\ & r=\frac{6}{10}cm=0.6cm \\\end{align}$
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