54.
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What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm?
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344.35 cm2
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462 cm2
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498.35 cm2
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None of these
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Answer:
Answer: Option C
Explanation:
h = 14 cm, r = 7 cm.
So, l = (7)2 + (14)2 = 245 = 75 cm.
 Total surface area
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=  rl + r2
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=
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22
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x 7 x 75 +
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22
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x 7 x 7
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 cm2
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7
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7
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= [154(5 + 1)] cm2
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= (154 x 3.236) cm2
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= 498.35 cm2.
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Title :
Volume 54Q
Description : 54. What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm? A. 344.35 cm 2 B. 462 cm 2 ...
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