A) Rs. 20
B) Rs. 22.50
C) Rs. 25
D) Rs. 27.50
Correct Answer: D
Solution :
If the price of any commodity is reduced by r% due to this any person can by A kg more in Rs. x then. Original value of commodity \[=Rs.\frac{rx}{(100-r)A}\text{per}\,\,\text{kg}\] (Here, \[r=20%,\text{ }\] \[x=Rs.\,385,\] and\[A=3.5\,kg\]) \[\therefore \] Original price of rice \[=\frac{20\times 385}{(100-20)\times 3.5}\] \[=\frac{20\times 385}{80\times 3.5}=Rs.\,27.50\,\text{per}\,\,\text{kg}\]You need to login to perform this action.
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