Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Environmental Science Environmental Pollution and Control
A tributary flowing at a rate of 4 m3/s converges into a river flowing at a rate of 8.0 m3/s. The concentration of a pollutant 'X' at the upstream of the tributary before convergence was 12 mg/L and that of the river was 30 mg/L. If the pollutant X is completely mixed in the downstream, what would be its concentration?
1
30 mg/L
2
21 mg/L
3
42 mg/L
4
24 mg/L