Ratios & Proportion
Aptitude

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Q.

The monthly salaries of two persons are in the ratio of $4:7$. If each receives an increase of Rs.25 in the salary, the ratio is altered to $3:5$. Find their respective salaries. 

 A.

120 and 210

 B.

80 and 140

 C.

180 and 300

 D.

200 and 350

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Solution:
Option(D) is correct

Let the salaries be $4x$ and $7x$

Therefore,

\(\begin{align*} \dfrac{4x+25}{7x+25}&=\dfrac{3}{5}\\ 5(4x+25)&=3(7x+25)\\ 20x+125&=21x+75\\ x&=50 \end{align*}\)

Therefore, their salaries are $4×50$ and $7×50$ i.e., 200 and 350


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