WAEC - Mathematics (2011 - No. 17)
The height of a cylinder is equal to its radius. If the volume is 0.216 \(\pi\) m\(^3\). Calculate the radius.
0.46m
0.60m
0.87m
1.80m
คำอธิบาย
volume of cylinder = \(\pi r^2\)h
0.216\(\pi\) m\(^3\) = \(\pi \times r^2 \times h\)
Since r = h,
0.216 = r\(^3\)
r\(^3\) = 0.216
r = \(\sqrt[3]{0.216}\)
= 0.6
0.216\(\pi\) m\(^3\) = \(\pi \times r^2 \times h\)
Since r = h,
0.216 = r\(^3\)
r\(^3\) = 0.216
r = \(\sqrt[3]{0.216}\)
= 0.6