A, B and C start a business. A invests 3 times as much as B invest. B invests \(\frac{4}{7}\) part of what C invests. At the end of year they get Rs.9200 as a profit. Find A’s share in the profit .

4800

           A   :   B   :   C

Inv.⇒   3   :  1

                   4   :    7

----------------------------------    

⇒         12  :  4    :   7

*If time is same then investment ratio becomes profit ratio*

Profit:  12  :  4    :   7    =   23R

23R = 9200

1R = 400

A's Profit = 12R = 12 × 400 = 4800