Question

A right circular cone having radius 5 cm and height 12 cm is given. The curved surface area of the cone is ki​

Answer 1

Answer:

The slant height would be the hypoteneuse of a right triangle whoses are the base radius and height. Pythagorus taught us the rest.

Slant height. = √(5² + 7²). = √(25 + 49)

= √74. Or approx 8.6 cm.

Surface Area = area of base + area of sl0ped arwa.

Aeea of base = πr² = 25π

Area of sloped side: = 1/2 circ of base × slant height

= 1/2 × 2π 5 × √74 =™5√(74)π

Total surface area = (25+5√74)π

.=( 25+5×8.6)π = (25+43)π = 68π or approx 213.63 cm²

Abby R

Answer 2

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A right circular cone having radius 5 cm and height 12 cm.

The curved surface area of the cone.

Therefore,the slant height of the cone is 13 cm.

Hence, the curved surface area of the cone = 204.28 cm