A) 30%
B) 25%
C) 20%
D) Data inadequate
E) None of these
Correct Answer: B
Solution :
Effective change in area \[=\left( x+y+\frac{xy}{100} \right)%\] \[\Rightarrow \,\,50=20+y+\frac{20\times y}{100}\] \[\Rightarrow \,\,50-20=y+\frac{y}{5}\] \[\Rightarrow \,\,30=\frac{6y}{5}\] \[\Rightarrow \,\,y=\frac{30\times 5}{6}=25\]You need to login to perform this action.
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