What's the lateral area and surface area of a right cone with radius 6 cm and slant height 13 cm?

Question

3874 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2018-06-04T22:38:14

$"Lateral Area" = πr ℓ$

$color(white)("Lateral Area") = 22/7 × "6 cm × 13 cm"$

$color(white)("Lateral Area") = 245.1\ "cm"^2$

$"Surface Area" = πr(r + ℓ)$

$color(white)("Surface Area") = 22/7 × "6 cm" × ("6 cm + 13 cm")$

$color(white)("Surface Area") = 132/7\ "cm" × "19 cm"$

$color(white)("Surface Area") = 358.3\ "cm"^2$