Question

volume of a hemisphere is 19404cm then find its total surface area

Answer 1

Heyy mate ❤✌✌❤

Here's your Answer...

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Volume of Hemisphere = (2 × pie × r^3) /3

19404 = (2 × pie × r^3) /3

19404 × 3 = 2 × 22/7 × r^3

58212 × 7/ 22 × 1/2 = r^3

29106 × 7 /22 = r^3

9261 = r^3

r = 21cm.

Total Surface Area = 3 × pie × r^2

= 3 × 22/7 × 21 ×21

= 3 × 22 × 21 × 3

= 4158 cm^2.
✔✔✔

Answer 2

volume of hemisphere=19404
2/3*22/7*r cube=19404
R cube=19404*21/44
R cube=441*21
R cube= 9261
R = cube√9261
R=21
tsa of hemisphere=(2*22/7*21*21+22/7*21*21)=3*22/7*21*21
total surface area=(6*462+3*462)=9*462
total surface area=4158=4158
volume =4158