Question

Calculate the total surface area of this hemisphere radius 9 give your answer in 1 decimal place ​

Answer 1

763.4 units²

Explanation:

Curved SA = 2×pi×r²

= 2×pi×9² = 162pi units²

Circular base = pi×r²

= pi×9² = 81pi units²

Total = 162pi + 81pi = 243pi units²

= 763.4070148 units²

= 763.4 units²