Test Index

WAEC Agriculture 2015 Paper

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Question : 15

Total: 57

What is the percentage water content of soil sample which weighed 180g when fresh and 120g when oven-dried

20.14%
25.00%
33.33%
60.00%

Solution:

Concept:

Water content is the mass of water lost after oven-drying, expressed as a percentage of the fresh soil mass.

Explanation:

Fresh soil mass

= 180\text{ g}

Oven-dried soil mass

= 120\text{ g}

Mass of water lost

= 180 - 120 = 60\text{ g}

Percentage water content

= \frac{\text{mass of water lost}}{\text{fresh soil mass}} \times 100

= \frac{60}{180} \times 100

= 33.33\%

Answer:

C.

33.33\%

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