A reactor has feed from 2 streams, one with rate 10 Kg/hr and other with 30 Kg/hr, and product side also has 2 streams one of which is at the rate of 15 Kg/hr, what is the rate of other product stream?

Correct Answer: 25 Kg/hr
Total feed rate = Total product rate, => 10 + 30 = 15 + x, => x = 25 Kg/hr.