CAT Mensuration Bible Top 10 Must Solve Mensuration Questions covering 90% of Syllabus – Page 7
All 19 Mensuration questions from CAT papers. Tap Show answer, or open the detailed solution (free login). Page 7 of 7.
Refer to the passage above ↑
A park is shaped like a rhombus and has area 96 sq m. If 40 m of fencing is needed to enclose the park, the cost, in INR, of laying electric wires along its two diagonals, at the rate of ₹125 per m, is
Answer: 3500
Solution — first steps
Step 1. Each rhombus side 40/4=10.
Step 2. For diagonals p, q, pq 192 and p²+q²400.
Step 2. For diagonals p, q, pq 192 and p²+q²400.
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Last day solving checklist
- Name the unknown. Include its unit and state whether it is a count, amount, rate or parameter.
- Form the relationships. Translate each given condition into an equation or restriction.
- Choose the method. Use the formula, substitution, elimination, a sign chart or a bound appropriate to this concept.
- Check restrictions. Check integer counts, signs, nonzero denominators, domains and all original conditions.
- Verify the answer. Substitute into the original question; for an extreme, show a feasible example reaches it.
All 12 repeating CAT PYQs and how much each adds
| CAT PYQ | Repeating CAT PYQ | Questions | Representative | Cumulative questions | Cumulative share |
|---|---|---|---|---|---|
| 1 | Common heights midpoints and triangle area ratios | 10 | CAT 2021 S2 Q11 | 10 | 32.26% |
| 2 | Rhombus diagonals side and area | 3 | CAT 2021 S2 Q9 | 13 | 41.94% |
| 3 | Regular polygon decomposition and area | 3 | CAT 2021 S1 Q6 | 16 | 51.61% |
| 4 | Trapezium area after finding height | 3 | CAT 2022 S1 Q11 | 19 | 61.29% |
| 5 | Right triangle incircle and area | 2 | CAT 2021 S1 Q14 | 21 | 67.74% |
| 6 | Rectangle area constraint and optimisation | 2 | CAT 2021 S3 Q19 | 23 | 74.19% |
| 7 | Circle sectors segments and overlapping regions | 2 | CAT 2022 S3 Q18 | 25 | 80.65% |
| 8 | Area of a region defined by coordinate equations | 2 | CAT 2023 S2 Q19 | 27 | 87.10% |
| 9 | Parallelogram area from angle and diagonal | 1 | CAT 2021 S3 Q11 | 28 | 90.32% |
| 10 | Rectangle on a circle from perimeter and diameter | 1 | CAT 2022 S1 Q19 | 29 | 93.55% |
| 11 | Right triangle on a diameter and proportional legs | 1 | CAT 2023 S2 Q18 | 30 | 96.77% |
| 12 | Cuboid surface area and sphere diameter | 1 | CAT 2024 S1 Q16 | 31 | 100% |
Based on CAT Actual Quant Papers.