A) \[15\text{ }cm\]
B) \[30\text{ }cm\]
C) \[60\text{ }cm\]
D) \[7.5\text{ }cm\]
Correct Answer: A
Solution :
\[{{n}_{C}}=2{{n}_{0}}\] \[\frac{V}{4{{\ell }_{C}}}=2\frac{V}{2\ell }\] \[{{\ell }_{C}}=\frac{\ell }{4}=\frac{60}{4}=15\,cm\]You need to login to perform this action.
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