Calculate the total surface area of a cone of h... - WAEC Mathematics 1993 Question
Calculate the total surface area of a cone of height 12cm and base radius 5cm. [Take π = 22/7]
A
180 5/7cm2
B
240 2/7cm2
C
235 5/7cm2
D
282 6/7cm2
correct option: d
πrl + πr2 = πr(l + r)
22/7 x 5(13 + 5)
282 6/7cm2
22/7 x 5(13 + 5)
282 6/7cm2
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