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If price of rice increased by 25%, so that a man is can able to purchase 5 kg less rice in Rs. 500. Find the original price of rice per kg ?

Correct Answer: Rs. 20

Explanation:

Let the original price of rice be Rs. x


Let rice a man can buy for Rs. 500 at rs. x/kg be = R kgs


From given data, for Rs. 500


x ---- R kgs


(x + 25x/100) ---- (R - 5) kgs


=> Rx = (R - 5)(x + 25x/100)


=> Rx = (R - 5)(125x/100)


=> 100Rx = 125Rx - 625x


=> R = 25


So at rate of Rs. x/kg, man get 25 kgs for Rs. 500


=> x = 500/25 = Rs. 20


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