Question

If one-third of one-fourth of a number is $15$, then how much is three-tenth of that number?

• A. $35$
• B. $36$
• C. $45$
• D. $54$

Answer 1

The correct option is D $54$

Let the required number be $x$.
$\frac{1}{3}$ of $\frac{1}{4}$ of $x=15$
$\Rightarrow x=15\times 4\times 3=180$
$\Rightarrow \frac{3}{10}$ of $x=\frac{3}{10}\times 180=54$