A balloon s radius increases 3 times when the air is pumped in it. If – McqOptions

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1.	A balloon s radius increases 3 times when the air is pumped in it. If the surface area of the balloon after pumping the air is A₂ and its surface area before pumping the air is A₁, then what is the value of ( frac{A_1}{A_2} ) ?
A.	( frac{9}{1} )
B.	( frac{1}{3} )
C.	( frac{3}{1} )
D.	( frac{1}{9} )
Answer» E.

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