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Applicable Provisions — Sections 146 and 147 of the Indian Contract Act, 1872
Part 1: Liability of X, Y, and Z when Mr. D defaults to the tune of ₹42,000
Section 147 of the Indian Contract Act, 1872 governs the situation of co-sureties who are bound in different sums. It states that co-sureties bound in different sums are liable to pay equally as far as the limits of their respective obligations permit.
Here, X, Y, and Z are co-sureties with penalty bonds of ₹1,00,000, ₹20,000, and ₹40,000 respectively. Mr. D defaults on ₹42,000.
Step 1 — Equal division: ₹42,000 ÷ 3 = ₹14,000 per surety.
Step 2 — Check against individual limits:
- X's limit: ₹1,00,000 → ₹14,000 is within limit ✓
- Y's limit: ₹20,000 → ₹14,000 is within limit ✓
- Z's limit: ₹40,000 → ₹14,000 is within limit ✓
Conclusion: Since all sureties can absorb the equal share within their respective penalty bonds, each of X, Y, and Z is liable to contribute ₹14,000 to Mr. R, totalling ₹42,000.
Part 2: Situation where there is no contractual arrangement among the sureties
Section 146 of the Indian Contract Act, 1872 provides that in the absence of any contract to the contrary, co-sureties are bound, as between themselves, to pay each an equal share of the whole debt or the unpaid portion thereof.
Where there is no specific contractual arrangement defining varying penalty amounts, Section 146 applies as the default statutory rule. Mr. D's default of ₹42,000 is divided equally: ₹42,000 ÷ 3 = ₹14,000 each.
Key distinction: Under Section 147 (different bond amounts), the equal-sharing principle operates subject to individual ceilings. Under Section 146 (no contractual arrangement), the equal-sharing principle operates without any prescribed ceiling per surety. In the present facts, the outcome is identical — each surety pays ₹14,000 — because the equal share falls comfortably within every surety's individual limit even under Section 147.
Final Answer: Under both scenarios, X, Y, and Z are each liable to pay ₹14,000 to Mr. R on Mr. D's default of ₹42,000.