Question

Find the total surface area of a cone
with diameter 6cm and slant
height
Il cm.​

Answer 1

Answer:

132 cm.

Step-by-step explanation:

Given:- r = d/2 = 6/2 = 3cm, l = 11cm.

Total surface area of a cone = πr(l+r)

$= \frac{22}{7} \times 3 \: \: (11 + 3) \\ = \frac{22}{7} \times 3 \times 14 \\ = 22 \times 3 \times 2 = 132cm$

Hope it helps...