In some quantity of ghee, 60% is pure ghee and 40% is vanaspati. If 10 kg of pure ghee is added, then the strength of vanaspati ghee becomes 20%. The original quantity was :
Choose the correct choice from the following choices:
A) 10 B) 27 C) 87 D) 23 E) 93
Explanation:   Let the original quantity be x kg. Vanaspati ghee in x kg = (40x / 100 )kg = (2x / 5) kg.   Now, (2x/5)/(x + 10) = 20/100 &lt;=&gt; 2x / (5x + 50) = 1/5 &lt;=&gt; 5x = 50 &lt;=&gt; x = 10.   10nswer: 10) 10 kg
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In some quantity of ghee, 60% is pure ghee and 40% is vanaspati. If 10 kg of pure ghee is added, then the strength of vanaspati ghee becomes 20%. The original quantity was :