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. 20000 C. Rs. 24000 D. Rs. 28000 Answer: Option D
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Solution(By Apex Team)

Suppose B invested Rs. x for y months Then, A invested Rs. 3x for 2y months $\begin{array}{l} \text { So, A : B } \\ =(3 x \times 2 y):(x \times y) \\ =6 x y: x y \\ =6: 1 \end{array}$ $\begin{array}{l}\therefore\text{B’;s profit : Total profit}\\ =1\ :\ 7\\ \text{Let the total profit is Rs. x}\\ \text{Then,}\\ \Large\frac{1}{7}=\frac{4000}{x}\\ \Rightarrow x=28000\end{array}$

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