Concept:Profit is shared in proportion to the product of capital invested and the time period. When a partner changes their investment, calculate the time-weighted capital.
Explanation:Let initial capitals of A, B, C be
2x,
3x,
4x respectively.
A invests
2x for first 6 months. After 6 months, he increases capital by 50%, so new capital =
2x+50% of 2x=3x. He invests
3x for the remaining 18 months (total 24 months).
Time-weighted investment of A:
(2x×6)+(3x×18)=12x+54x=66x.
B invests
3x for full 24 months:
3x×24=72x.
C invests
4x for full 24 months:
4x×24=96x.
Profit ratio of A : B : C =
66x:72x:96x. Divide by
6x to simplify:
11:12:16.
Sum of ratio parts =
11+12+16=39.
A’s share of total profit Rs. 90,000 =
3911​×90,000=25,384.615...≈Rs. 25,384.62.
Answer:Rs. 25,384.62 (Option D)