A and B are two fixed points 5 cm apart and C is a point an AB such that AC is 3 cm. If the length of AC is increased by 6%, the length CB is decreased by :

Answer: Option D

After increment of 6% new length of AC
= 3 + $$\frac{3\times 6}{100}$$ = 3.18cm
Required % decrease
= $$\frac{0.18}{2}$$ × 100
= 9%