A township contains how many acres in total?
Correct Answer
B) 23,040 acres
Why this is correct: Under the Rectangular Survey System, a standard township is a 6-mile by 6-mile square containing 36 sections. Each section is 1 square mile, or 640 acres. Total township acres = 36 sections * 640 acres per section = 23040 acres. Why the other choices are wrong: 640 acres is one section. 5,760 acres is the area of 9 sections (9 * 640). 36,000 acres is not a standard calculation. Exam tip: Township = 36 sections = 23040 acres. Section = 640 acres. Quarter Section = 160 acres.
Why This Is the Correct Answer
Option B is correct at 23,040 acres. A township contains 36 sections and each section holds 640 acres, so multiplying gives 23,040. The area route confirms it, since 36 square miles at 640 acres per square mile is the same number. Remember that this is a nominal figure, since convergence of meridians makes real townships slightly irregular and pushes the adjustment into the sections along the north and west boundaries.
Why the Other Options Are Wrong
Option A: 640 acres
640 acres is a single section, one thirty-sixth of the township, so this choice mistakes the part for the whole. It is the most familiar number in the system, which is exactly why it is offered. The stem asks for the township total, which requires multiplying by 36.
Option C: 5,760 acres
5,760 acres equals nine sections, or a quarter of the township, and corresponds to no standard unit in the survey system. It may arise from multiplying 640 by 9 or from confusing the six-mile dimension with a smaller count of sections. No aliquot or survey unit matches this figure.
Option D: 36,000 acres
36,000 acres appears to come from taking the section count of 36 and appending zeros rather than multiplying by 640. The round number is a warning sign, since acreage figures in this system are multiples of 640 and rarely land on tidy thousands. Carrying out the multiplication produces 23,040 instead.
Thirty-six times six-forty
Six by six equals thirty-six sections. Thirty-six times 640 acres is 23,040. Anchor on the two constants and the multiplication does itself.
How to use: Decide first which level of the hierarchy the question is asking about: township, section, or aliquot part. Then apply the constant for that level rather than reaching for the most familiar number.
Exam Tip
Be suspicious of round numbers in survey math. Acreages in this system descend from 640, so results ending in tidy thousands are usually distractors.
Common Mistakes to Avoid
- -Reporting one section's acreage as the township total
- -Forgetting that a township contains 36 sections
- -Assuming every township is exactly regular despite convergence
- -Using nominal acreage for parcels that are actually government lots
Concept Deep Dive
Analysis
This tests the top of the Public Land Survey System hierarchy. A township is bounded by township lines running parallel to the baseline and range lines running parallel to the principal meridian, spaced six miles apart, so a township is nominally six miles square and covers 36 square miles. Each square mile is a section containing 640 acres, so the township holds 36 times 640, or 23,040 acres. The same figure can be reached by area: six miles by six miles is 36 square miles, and at 640 acres per square mile the result is identical. In practice townships are not perfectly regular, because meridians converge toward the poles and surveyors inserted correction lines and guide meridians to compensate, leaving the north and west tiers of sections with government lots of irregular acreage. The nominal figure is what the exam wants, but the practicing appraiser checks the plat.
Background Knowledge
You need the PLSS hierarchy from principal meridian and baseline down through townships, sections, and aliquot parts, together with the constants of 36 sections per township and 640 acres per section. You should also know why convergence of meridians requires correction lines and guide meridians, and that government lots absorb the resulting irregularity along the north and west edges of a township.
Real-World Application
Working a rural assignment described by township and range, you locate the township on the county plat, confirm the subject section is interior rather than on the north or west tier, and use nominal aliquot acreages with confidence. For a parcel on the township edge, you take the surveyed government lot acreage from the plat instead.
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