What is the total surface area of a right circular cone with a base radius of 7 cm and a height of 14 cm?
A. 344.35 cm2
B. 462 cm2
C. 498.35 cm2
D. None of these
Answer:C
What is the total surface area of a right circular cone with a base radius of 7 cm and a height of 14 cm?
A. 344.35 cm2 B. 462 cm2 C. 498.35 cm2 D. None of these
Explanation: r = 7 cm, h = 14 cm=As a result, l = (7)2 + (14)2 = 245 = 75 centimetres.=rl + r2 = 22/7 x 7 x 75 + 22/7 x 7 x 7 cm2 total surface area= [154(5 + 1) cm2 = 498.35 cm2 = (154 x 3.236) cm2.