20% of 30% of twice a number is 36. Find the number
Correct Answer: Option D
Let the required number be ‘u’, then,
According to the question
⇒ 20% of (30% of 2u) = 36
\(\therefore \frac{{20}}{{100}} \times \left( {\frac{{30}}{{100}} \times 2u} \right) = 36\)
\(\eqalign{ & \Rightarrow u = \frac{{36 \times 100 \times 100}}{{2 \times 20 \times 30}}\; \cr & \Rightarrow {\text{ }}u{\text{ }} = {\text{ }}300. \cr}\)
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