Question

The total surface area of hemisphere is 763.72sq.cm . Find the diameter ​

Answer 1

The diameter of the hemisphere is 18 cm

1) The given total surface area of a hemisphere is 763.72 square cm.

2) The formula to calculate the total surface area of hemisphere is 3πr²

3) equating both the total surface areas of hemisphere

763.72 = 3πr²

4) Solving, for r:

763.72 = 3*3,14 *r²

r² = 81.07 square cm.

r = 9.003 cm

5) The diameter would be d = 2r = 18.006 cm