If a positive number 'k' when multiplied by 30% of itself gives a number which is 170% more than the number 'k' then the number 'k' is equal to:

A. 9

B. 5

C. 6

D. 7

Answer: Option A

Solution(By Examveda Team)

$$\eqalign{ & k \times \left( {k \times 30\% } \right) = k \times 270\% \cr & \Rightarrow k \times k \times \frac{{30}}{{100}} = k \times \frac{{270}}{{100}} \cr & \Rightarrow k = 9 \cr} $$