A) 16.67
B) 18.57
C) 85.18
D) 7.66
Correct Answer: A
Solution :
\[K.E.\propto T\] \[\therefore \]\[\frac{{{\left( KE \right)}_{1}}}{{{\left( KE \right)}_{2}}}=\frac{{{T}_{1}}}{{{T}_{2}}}=\frac{300}{350}\] \[\therefore \]\[{{(KE)}_{2}}=\frac{350}{300}{{(KE)}_{1}}\]% change in K.E. \[=\frac{{{\left( KE \right)}_{2}}-{{\left( KE \right)}_{1}}}{{{\left( KE \right)}_{1}}}\times 100=\frac{350-300}{300}\times 100=16.67%\]
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