WAEC - Agricultural Science (2004 - No. 7)
What is the percentage porosity of a soil sample whose volume is 250cm when the volume of air is 200cm?
20
25
50
80
설명
Parameters given:
Volume of soil = 250\(cm^3\)
Volume of air =200\(cm^3\)
Percentage porosity = Volume of space occupied by the soil/Volume of soil
Therefore,%porosity = \(\frac{ 50cm^3}{250cm^3} \times 100 \)= 20%
Volume of soil = 250\(cm^3\)
Volume of air =200\(cm^3\)
Percentage porosity = Volume of space occupied by the soil/Volume of soil
Therefore,%porosity = \(\frac{ 50cm^3}{250cm^3} \times 100 \)= 20%