A 100 ml solution of H2​SO4 ​having concentration of 20% is mixed with a 50% concentrated x ml mixture such that the net mixture is 30% concentrated. Determine x.

70 ml 80 ml 60 ml 50 ml

50 ml

Ratio = 20 : 10 = 2 : 1, ⇒ Here, 2 unit = 100 ml, ⇒ Therefore, 1 unit = 50 ml.