Question

Find the total surface area of hemisphere 18 cm

Answer 1

You have not mentioned whether 18 is the radius or diameter. So I am considering it as the radius.

TSA of hemisphere = 3 x pi x r²

3 x 22/ 7 x 18²

= 21384/ 7

= 3054.85 cm²

therefore the total surface area of the hemisphere is 3054.85 cm²

Answer 2

Total surface area of hemisphere =3πr^
=3(22/7)(9)(9)
=763.714cm^

But if that the diameter is of 18 cm

THANKS!