Question on: WAEC Mathematics - 2011
The height of a cylinder is equal to its radius. If the volume is 0.216 \(\pi m^3\) Calculate the radius.
A
0.46m
B
0.60m
C
0.87m
D
1.80m
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Correct Option: A
volume of cylinder = \(\pi r^2\)h
0.216\(\pi m^3 = \pi \times r^2 \times 1m\)
assumed that h = 1m
0.216 = r2
r2 = 0.216
r = \(\sqrt{0.216}\)
= 0.46
0.216\(\pi m^3 = \pi \times r^2 \times 1m\)
assumed that h = 1m
0.216 = r2
r2 = 0.216
r = \(\sqrt{0.216}\)
= 0.46
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