Question

The height of the cone is 20 cm and radius of its base 21 find its total surface

Answer 1

Answer:

3300cm²

Step-by-step explanation:

height of cone, h= 20cm

radius of cone base, r = 21cm

Slant height, l = √ l²+ r² = 29cm

Total Surface Area = πrl + πr² = 1914 + 1386 = 3300cm²