By selling salt at Rs.1 a kg a man gains 10%

By selling salt at Rs.1 a kg a man gains 10%. By how much must he raise the price as to gain 21%?
(a) 20 paise
(b) 10 paise
(c) 30 paise
(d) None of these

Anurag Mishra Professor Asked on 13th March 2016 in Maths.
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    Answer: (b) 10 paise 

    Anurag Mishra Professor Answered on 13th March 2016.
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