A reduction of 21% in the price of wheat enables a person to buy 10.5 kg more for Rs. 100. What is the reduced
price per kg.?
Let original price = Rs. `x` per kg. Reduced price = Rs.`((79x)/(100))` per kg.
`:.` ` (100)/((79x)/(100)) - 100/x` = 10.5 `hArr (10000)/(79x) - 100/x` = 10.5
`hArr 10000 - 7900 = 10.5 xx 79x hArr x = (2100)/(10.5 xx 79)`
`:.` Reduced price = Rs`(79/100 xx (2100)/(10.5 xx 79))` per kg = Rs. 2 per kg.
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