A) Rs. 50
B) Rs. 55
C) Rs. 100
D) Rs. 110
Correct Answer: A
Solution :
Let the CP be Rs. x. First selling price \[=90%\,\,\text{of}\,\,x\,\,\text{=}\,\,\text{Rs}\text{.}\frac{9x}{10}\] Second selling price \[\text{=}\,\,\text{Rs}\text{.}\left( \frac{9x}{10}+10 \right)\] \[\therefore \] \[\text{110 }\!\!%\!\!\text{ }\,\,\text{of}\,\,x\,\,\text{=}\,\,\text{Rs}\text{.}\left( \frac{9x}{10}+10 \right)\] \[\Rightarrow \] \[\frac{11x}{10}=\frac{9x}{10}+10\] \[\Rightarrow \] \[\frac{2x}{10}=10\] \[\Rightarrow \] \[x=\frac{10\times 10}{2}=50\]You need to login to perform this action.
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