Question

Twenty years ago, my age was ${\frac{1}{3}}^{rd}$ of what it is now. My present age is

• A. $25$ years
• B. $30$ years
• C. $33$ years
• D. $42$ years

Answer 1

Answer: (B)

$30$ years

Let my present age be $x$ years
Twenty years ago my age was $=(x-20)$ years
According to the given condition,
$x-20=\frac{1}{3}\times x⟹3(x-20)=x[Bycross-multiplication]⟹3x-60=x⟹3x-x=60⟹2x=60⟹x=30$
Hence, my present age is $30$ years.