Question:hard
For the trench type of sanitary fill, the amount of land required for a 2 metre deep trench for a population of 10,000 is:
For the trench type of sanitary fill, the amount of land required for a 2 metre deep trench for a population of 10,000 is:
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One acre is about 4046 square metres, roughly a 200 m square.
Updated On: Jun 23, 2026
- 1 acre
- 2 acre
- 3 acre
- 4 acre
Show Solution
The Correct Option is A
Solution and Explanation
Step 1: Sizing land for trench-type sanitary filling starts from the standard requirement of roughly 3 to 5 m of trench length for every 100 persons served.
Step 2: Scaling that to a population of 10,000 yields about 300 to 500 m of trench, to which a buffer strip of around 30 m along the boundary is added.
Step 3: Converting to area, one acre is approximately $4046$ square metres, equivalent to a $200 \text{ m} \times 200 \text{ m}$ field, which is sufficient to hold this trench length together with its margin.
Step 4: Hence the land needed for a 2 m deep trench for 10,000 people is one acre.\[\boxed{1 \text{ acre}}\]
Step 2: Scaling that to a population of 10,000 yields about 300 to 500 m of trench, to which a buffer strip of around 30 m along the boundary is added.
Step 3: Converting to area, one acre is approximately $4046$ square metres, equivalent to a $200 \text{ m} \times 200 \text{ m}$ field, which is sufficient to hold this trench length together with its margin.
Step 4: Hence the land needed for a 2 m deep trench for 10,000 people is one acre.\[\boxed{1 \text{ acre}}\]
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