In some quantity of ghee 60% is pure ghee and 40% is vanaspati. If 10 kg of ghee is added then the strength of vanaspati in ghee become 20% . The original quantity was? A. 10kg B. 15kg C. 20kg D. 25kg
Original be x quantity.
Vanaspati in x kilogram is 0.4 x
0.4x / (x+10) = 0.2
0.4x= 0.2 x +2
0.2 x= 2