A and B start a business, with A investing the total capital of Rs.50000, on…

In a partnership with a working partner's salary and a private interest payment between partners, total profit is allocated in a fixed order: first the working partner's salary, then any interest owed between partners for an unequal capital contribution, and only the leftover profit is divided in the agreed ratio — here, equally. The 10% interest B pays A is a personal transfer for using half of A's invested capital; it is separate from the profit-sharing split.

1. A's annual salary, paid from the total profit before any split: Rs. 1,500 × 12 = Rs. 18,000.

2. Interest B pays A for using half of A's capital: 10% of (Rs. 50,000 ÷ 2) = 10% of Rs. 25,000 = Rs. 2,500 per year.

3. Let the total profit be P. After A's salary is paid, the remaining profit P − 18,000 is shared equally, so each partner's share is (P − 18,000) ÷ 2 — call this share S.

4. A's total income = salary + share + interest received = 18,000 + S + 2,500.

5. B's total income = share alone = S (the equal-sharing clause applies only to the remaining profit).

6. Given A's income is twice B's income: 18,000 + S + 2,500 = 2S, so 20,500 + S = 2S, giving S = 20,500.

7. Remaining profit = 2S = 41,000, so total profit P = 41,000 + 18,000 = Rs. 59,000.

Cross-check: with total profit Rs. 59,000, each partner's equal share of the remaining profit is Rs. 20,500. A's income = 18,000 (salary) + 20,500 (share) + 2,500 (interest received) = Rs. 41,000. B's income = Rs. 20,500 (share only). Indeed 41,000 is exactly twice 20,500, confirming the total profit is Rs. 59,000.