Two partners with capitals for different months: one partner's share

The same question, asked 4 times: 12 Sep 2025 S1*, 14 Sep 2025 S3*, 15 Sep 2025 S3*, 17 Sep 2025 S2. Every wording below, oldest first.

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Question 1
12 Sep 2025 S1
56 $A and B start a business. A invests ₹80,000 for 9 months, B invests ₹1,20,000 for 6 months. What is B’s share of a ₹45,000 profit?$
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Question 2
14 Sep 2025 S3
54 $A invests ₹25,000 for 12 months, B invests ₹50,000 for 6 months. What is A's share of ₹30,000 profit?$
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Question 3
15 Sep 2025 S3
55 $A invests ₹60,000 while B invests ₹90,000, with A's investment lasting for 10 months and B's for 8 months. The total profit amounts to ₹40,000. What is the A's share ?$
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Question 4
17 Sep 2025 S2
54 $A and B invest ₹45,000 and ₹60,000 respectively. A remains in business for 8 months, B for 6 months. If the total profit is ₹36,000, what is A’s share?$
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Question 1