JAMB - Mathematics (1980 - No. 30)
Find the area of the curved surface of a cone whose base radius is 6cm and whose height is 8cm. (take \(\pi\) = \(\frac{22}{7}\))
188.57cm2
1320cm2
188cm2
188.08cm2
10cm2
Vysvětlení
S = curved surface area = \(\pi\)rL
= \(\frac{22}{7}\) x 6 x 10
= 188.57cm2
= \(\frac{22}{7}\) x 6 x 10
= 188.57cm2