A) Rs. 78
B) Rs. 90
C) Rs. 110 .
D) Rs. 122
Correct Answer: C
Solution :
Let the CP of the book = Rs, x \[\therefore \,\] SP of the book \[=\frac{120x}{100}\,=\]Rs. \[\frac{6x}{5}\,\] New CP of the book \[=\frac{x\times 80}{100}=Rs.\frac{4x}{5}\] and new SP of the book =Rs. \[\left( \frac{6x}{5}-22 \right)\] New profit \[=\left( \frac{6x}{5}-22-\frac{4x}{5} \right)=\]Rs. \[\left( \frac{2x}{5}-22 \right)\] \[\therefore \,\] \[25=\frac{\frac{2x}{5}-22}{\frac{4x}{5}}\times 100\] \[\Rightarrow \,\] \[\,\frac{x}{5}=\frac{2x}{5}-22\Rightarrow \frac{x}{5}=\frac{2x}{5}-22\] \[\Rightarrow \,\] \[x=22\times 5=110\]You need to login to perform this action.
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