3cm
6cm
9cm
12cm
More information is needed
Correct answer is B
Volume=43πr3=k ...(i)
S.A=4πr2=k ... (ii)
Divide (i) by (ii),
43πr3÷4πr2=kk
r3=1⟹r=3cm
Diameter = 2 x 3cm = 6cm
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