What is the capital of Russia?

In a partnership, A, B, and C invest capitals in the ratio 3 : 4 : 5. If their time of investment is in the ratio 2 : 3 : 1, find the ratio of their profits.

A, B and C enter into a partnership. A invests 3 times as much as B and B invests two-third of what C invests. Find the ratio of their capitals.

In a partnership, A, B and C invest capitals in the ratio 3 : 4 : 5. If the time periods of their investments are in the ratio 5 : 6 : 7, what is the ratio of their profits?