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 \[\frac{v+20%\,of\,v}{v}=\sqrt{\frac{T\times x%\,of\,T}{T}}\] \[\frac{6}{5}=\sqrt{\left( 1+\frac{x}{100} \right)}\] \[\frac{36}{25}=1+\frac{x}{100}\] or \[x=44%\] Thus, tension has to be increased by 44%.You need to login to perform this action.
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