Question
What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm?
Answer: Option B
- h = 14 cm, r = 7 cm.
So, l = (7)2 + (14)2 = 245 = 75 cm.
Total surface area =22/7 (rl + r2) = 22 x 7 x 75 + 22 x 7 x 7 cm2 7 7
= [154(5 + 1)] cm2
= (154 x 3.236) cm2 = 498.35 cm2.
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- h = 14 cm, r = 7 cm.
So, l = (7)2 + (14)2 = 245 = 75 cm.
Total surface area =22/7 (rl + r2) = 22 x 7 x 75 + 22 x 7 x 7 cm2 7 7
= [154(5 + 1)] cm2
= (154 x 3.236) cm2 = 498.35 cm2.
Was this answer helpful ?
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