If the earth were to suddenly contract to $\frac {1}{n}^{th}$ of its present radius without any change in its mass the duration of the new day will be nearly
If the earth were to suddenly contract to $\frac {1}{n}^{th}$ of its present radius without any change in its mass the duration of the new day will be nearly
- A
$\frac {24}{n}\,hr$
- B
$24\,n\,hr$
- C
$\frac {24}{n^2}\,hr$
- D
$24\,n^2\,hr$
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