Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) People Development & Environment Environmental Issues Pollution
Two streams A and B are flowing with flow rates of 20 m3/s and 5 m3/s respectively. The concentration of a pollutant X in the two streams are 15 mg/l (stream A) and 50 mg/l (stream B). The two streams join each other. Assume that complete mixing of the streams occurs after joining and the pollutant is a conservative substance. The downstream concentration of the pollutant after the joining of two streams would be:
1
30 mg/l
2
27 mg/l
3
25 mg/l
4
22 mg/l