A) 1 : 2
B) 2 : 1
C) 1 : 4
D) 4 : 1
Correct Answer: B
Solution :
\[h\propto \frac{1}{r}\]\ \[{{r}_{1}}{{h}_{1}}={{r}_{2}}{{h}_{2}}\Rightarrow \frac{{{h}_{1}}}{{{h}_{2}}}=\frac{{{r}_{_{2}}}}{{{r}_{1}}}=\frac{0.4}{0.2}=2:1\]
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