Question

Find the total surface area of a solid cone of base radius 8cm and vertical height 6cm. (use the value 3.14 for π and give answers to the nearest cm2.​

Answer 1

352cm²

Explanation:

formula = πr² + πLr

L = 6cm

r = 8cm

π = 3.14

3.14 × (8²) + 3.14 × 6 × 8

200.96 + 150.72

= 351.68

to the nearest cm² = 352cm²

Answer 2

351.68 cm^2

Explanation:

Radius= 8cm

Vertical length (l)=6cm

therefore, Total surface area of a solid cone

=
`\pi r^(2) +\pi rl`

`\pi r( r+l)\\3.14 *8(8+6)\\25.12(14)\\351.68`

Total Surface Area of the solid cone= 351.68 cm^2