If 40% of a number is less than its 60% by 30, then the 20% of that number is:

A. 60

B. 40

C. 50

D. 30

Answer: Option D

Solution(By Examveda Team)

$$\eqalign{ & {\text{Let the number be }}x \cr & \frac{{x \times 40}}{{100}} = \frac{{x \times 60}}{{100}} - 30 \cr & 40x = 60x - 3000 \cr & 20x = 3000 \cr & x = 150 \cr & \frac{{x \times 20}}{{100}} = \frac{{150 \times 20}}{{100}} = 30 \cr} $$