Question

Surface area of cone 220 slant height 10 find base circle radius

Answer 1

★ Answer :

We know that,

C.S.A = πrl

Where,

• l is Slant height = 10
• C.S.A = 220

→ 220 = 22/7 * 10 * r

→ 220 * 7/22 = 10 * r

→ 70 = 10r

→ r = 70/10

→ r = 7 units

$\rule{200}{2}$

T.S.A = πr(l + r)

→ T.S.A = 22/7 * 7 (10 + 7)

→ T.S.A = 22 * (10 + 7)

→ T.S.A = 22 * 17

→ T.S.A = 274 units²