What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm? Options: A . &nbsp344.35 cm 2 B . &nbsp462 cm 2 C . &nbsp498.35 cm 2 D . &nbspNone of these

Answer: Option C h = 14 cm, r = 7 cm. So, l = (7) 2 + (14) 2 = 245 = 7 5 cm. Total surface area = rl + r 2 = 22 x 7 x 7 5 + 22 x 7 x 7 cm 2 7 7 = [154( 5 + 1)] cm 2 = (154 x 3.236) cm 2 = 498.35 cm 2 .

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

Question

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

Options:

A . 344.35 cm²

B . 462 cm²

C . 498.35 cm²

D . None of these

Answer: Option C

h = 14 cm, r = 7 cm.

So, l = (7)² + (14)² = 245 = 75 cm.

Total surface area
= 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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