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22-02-2024
Mathematics

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In an unhealthy,dusty cement mill, there were 2.6 x 10^9 dust particles (sp gr =30) per cubic meter of air. Assuming the particles to be spheres of 2.0mill mdiameter, calculate the mass of dust (a) in 20m x 15m x 8.0m room and (b) inhaled in each average breath of 400cm^3 volume

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