In an experiment to determine the percentage of air in a soil sample, the following readings were recorded:
volume of water in measuring cylinder = 500 cm3
volume of soil added to water = 350 cm3
volume of water and soil after stirring = 800 cm3
the percentage of air in the soil sample is
-
A.
6.25% -
B.
10.36% -
C.
14.28% -
D.
43.28%
Correct Answer: Option A
Explanation
volume of air in the soil = (350 + 500) – 800
= 850 – 800 = 50 cm3
% of air in the soil = (volume of air)/total volume x (100)/1 = (50)/800 x 100 = 6.25%