A) \[44%\]
B) \[33%\]
C) \[22%\]
D) \[11%\]
Correct Answer: A
Solution :
We know that \[v\propto \sqrt{T}\] Let tension has to be increased by\[x%\], then \[\frac{v+20%\,\,of\,\,v}{v}=\sqrt{\frac{T-x%\,of\,T}{T}}\] \[\frac{6}{5}=\sqrt{\left( 1+\frac{x}{100} \right)}\] \[\frac{36}{25}=1+\frac{x}{100}\] Thus, tension has to be increased by\[44%\].You need to login to perform this action.
You will be redirected in
3 sec