Question

Find the diameter of a sphere, if the total surface area of a closed

Hemi-Sphere is 462 m2

.( π = 22

/7 )​

Answer 1

T.S.A of Hemisphere = 462 m²

=> 2πr² = 462

=> 2 × 22/7 × r² = 462

=> r² = 462×7/44

=> r² = 10.5 × 7

=> r = √73.5

=> r = 8.57 m

Now,

d = 2r = 2 × 8.57 = 17.14 m