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If one-third of one-fourth of a number is 15, then three-tenth of that number is:
Answer & Solution
Correct Answer:
Option
D
$$\eqalign{
& {\text{Let}}\,{\text{the}}\,{\text{number}}\,{\text{be}}\,x \cr
& {\text{Then}},\,\frac{1}{3}\,{\text{of}}\,\frac{1}{{4\,}}\,{\text{of}}\,x = 15\cr
& \Rightarrow \, x = 15 \times 12 = 180 \cr
& {\text{So,}}\,{\text{required}}\,{\text{number}} \cr
& = {\frac{3}{{10}} \times 180} \cr
& = 54 \cr} $$
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Login15*12=180
In The Question Requirement is : "then three-tenth of that number is:"
So We Get 3/10
3/10*180 (we can cut 180 is 18 time comes into 10th table )
So 3 * 18 = 54
Then X=15*12=180
180*3/10=54