Mining Engineering > GATE 2022 > Mine Environment
A city is spread over an area of 20 km×40 km. Wind, at an average speed of 4 m/s, enters perpendicular to the 20 km long side. On a winter day the inversion layer exists over the city at a height of 100 m. PM1 is emitted from the city at a rate of 1 kg/s. The steady state PM1 concentration in the city air, in μ g/m3, assuming Box model, is _________. (round off to one decimal place)
Correct : 125.0
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