A, B and C invested their capitals in the ratio 3 : 4 : 6. However their share of profit are equal. The duration of their investments must be in the ratio ?
A. 4 : 3 : 2 B. 6 : 4 : 3 C. 3 : 4 : 6 D. 1 : 1 : 1 Answer: Option AShow Answer
Solution(By Apex Team)
Let their investments be Rs. 3x for p months
Rs. 4x for q months and Rs. 6x for r months respectively
Then,
$\begin{array}{l}
3 x p: 4 x q: 6 x r=1: 1: 1 \\
\Rightarrow 3 p: 4 q: 6 r=1: 1: 1 \\
\text { So, } 3 p=4 q \\
\Leftrightarrow q=\frac{3 p}{4} \\
\text { And, } 4 q=6 r
\end{array}$
$\begin{aligned}&\Leftrightarrow r=\frac{2q}{3}=\left(\frac{2}{3}\times\frac{3}{4}p\right)=\frac{p}{2}\\
&\therefore p:q:r\\
&=p:\frac{3p}{4}:\frac{p}{2}\\
&=4:3:2\end{aligned}$
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