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Solution


Q.

Volume and surface area of a solid hemisphere are numerically equal. What is the diameter of hemisphere
1 9 units  
2 6 units  
3 4.5 units  
4 18 units  

Ans.

(1)

Volume of hemisphere = Surface area of hemisphere

⇒23πr3=3πr2⇒r=92units

∴ d = 9 units