a and b started a business jointly as investment was thrice..., Partnership, General Mathematics

Question:A and B started a business jointly. A's investment was thrice the investment of B and the period of his investment was two times the period of investment of B. If B received Rs. 4000 as profit, then their total profit is :

A `Rs. 16000` 
B `Rs. 24000` 
C `Rs. 20000` 
D `Rs. 28000`

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+ AnswerD

+ Explanationsolution:
Suppose `B` invested `Rs. x` for `y` months.
Then `A` invested `Rs. 3x for 2y`months.
`:. A : B = 3x xx 2x : x xx y = 6 : 1`.
`:. B's` profit : Total profit `= 1 : 7`.
`:. 1/7 = (4000)/z`
          or
      `z = 28000`.

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