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Question

A starts a business with Rs.40,000. After 2 months, B joined him with Rs. 60,000. C joined them after some more time with Rs. 1,20,000. At the end of the year, out of a total profit of Rs. 3,75,000, C gets Rs. 1,50,000 as his share. How many months after B joined the business, did C join?

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Solution

Let C joined for x months
Ratios of their investment,
=40000×12:60000×10:120000×x
=40×12:60×10:120×x
=40:5×10:10×x
=8:10:2x
=4:5:x
Cs share =150000
375000x9+x=150000
375x9+x=150
375x=1350+150x
225x=1350
x=6

Thus C joined for 6 months.
Total months B joined =10
Thus C joined after B=106=4 month

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