If one third of one-fourth of a number is 15, then three-tenth of that number will be :
Show Hint
``One third of one fourth'' $= \frac{1}{3} \times \frac{1}{4} = \frac{1}{12}$. So if $\frac{n}{12}=15$, then $n=180$. Then find $\frac{3}{10} \times 180 = 54$.