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What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm?

A.344.35 sq.cm
B.462 sq.cm
C.498.35 sq.cm
D.None of these
Answer and Feedback
Answer:C
Feedback:h = 14 cm, r = 7 cm.
So, l =[√7^2+14^2] = √245 = 7√5cm
Total surface area = πrl+πr2 = 22/7 × 7 × 7√5 + 22/7 × 7 × 7
= 154 (V5 + 1)
= (3.236 x 154) sq.cm
= 498.35 sq.cm

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