Question:For a sphere of a radius `10` cm, the numerical value of surface area is what percent of the numerical value of its volume ? 

A `24%` 
B `26.5%` 
C `30%` 
D `45%` 

+ Answer
C 

+ Explanation
surface area 

`= 4 πR^2`

`= 3/R (4/3 π R^3)`

`= 3/4 xx Volume

When `R = 10.` we have

`S = 3/10 V`

`= (3/10 xx 100)% of V`

`= 30% of V.`

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Irin Moni

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