15. यदि कोई कलम 4% हानि के स्थान पर 4% लाभ पर बेची जाती तो 6 रू. अधिक प्राप्त
कलम का क्रय-मूल्य निर्धारित कीजिए।
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Specific heat capacity is defined as the amount of heat required to raise the temperature of 1 kilogram of a substance by 1 kelvin (SI unit of specific heat capacity J kg−1 K−1).
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