Question

The radius and height of a cone are 21 cm and 20 cm respectively. Find the total
surface area of the cone.​

Answer 1

Answer:

Step-by-step explanation:

r = 21cm

h = 20cm

Formula -

T.S.A of a cone = πr(r+l)

l^2 = r^2 + h^2

Solution -

l^2 = 21^2 =+ 20^2

l^2 = 441 + 400

l^2 = 841

l = 29cm

now, t.s.a,

22/7*21(21+29)

22*3(50)

66*50

= 3300 cm^2

Answer 2

Answer:

refer to this attachment ✅✅