Armaan and Ghalib started a cafe with Tk. 40000 and Tk. 80000, respectively. Ghalib got married to someone in another town and left after 7 months. But Jishan immediately replaced him with an investment of Tk. 144000. At the end of the year, the business performed well and registered a profit of Tk. 50600.What is Ghalib’s share in this profit?

We know,
The ratio of Investment x Time = Ratio of Profit
∴ (A's investment x Time) : (B's investment x Time) = Profit of A : Profit of B

The total value of investment of Arman, Ghalib, and Jishan after 12 months is =
Tk. 40000 x 12 months : Tk. 80000 x 7 months : Tk. 144000 x (12 - 7)months = 480000 : 560000 : 720000
∴ Profit ratio = 240000 : 280000 : 360000 = 6 : 7 : 9
∴ Share of Ghalib = 7/(6 + 7 + 9) x 50600 = Tk. 16100