The salaries of A, B and C are in the ratio 1 : 3 : 4. If the salaries are increased by 5%, 10% and 15% respectively, then the increased salaries will be in the ratio:
$20: 66: 95$
$21: 66: 95$
$21: 66: 92$
$19: 66: 92$
$20: 66: 92$
Solution
Let the initial salaries of A, B and C be Rs. $x$, Rs. $3x$ and Rs. $4x$ respectively.
Respective ratio after correspondingg increase
$= \dfrac{x \times 105}{100} : \dfrac{3x \times 110}{100} : \dfrac{4x \times 115}{100}$
$\Rightarrow 105 : 330 : 460$
$=21: 66: 92$