If one-third of one-fourth of a number is 15, then three-tenth of that number is:
If one-third of one-fourth of a number is 15, then three-tenth of that number is: Correct Answer 54
$$\eqalign{ & {\text{Let}}\,{\text{the}}\,{\text{number}}\,{\text{be}}\,x \cr & {\text{Then}},\,\frac{1}{3}\,{\text{of}}\,\frac{1}{{4\,}}\,{\text{of}}\,x = 15\cr & \Rightarrow \, x = 15 \times 12 = 180 \cr & {\text{So,}}\,{\text{required}}\,{\text{number}} \cr & = {\frac{3}{{10}} \times 180} \cr & = 54 \cr} $$