A and B are two fixed points 5 cm apart and c is a point on AB such that AC = 3 cm. If the length of AC is increased by 6 % the length of CB is decreased by:_________?

A. 6 %
B. 7 %
C. 8 %
D. 9 %

Explanation:

AC = 3cm, CB = (5 – 3)cm = 2 cm

New length AC = 106 % of 3 cm

= (106/100 ×3) cm = 3.18 cm.

New length CB = (5 – 3.18) cm = 1.82 cm

CB Decreased on 2cm = (2 – 1.82)cm = 0.18cm

CB Decrease % = (0.18/2 ×100) % = 9 %

Correct Answer: 9 % ✔

Last Updated: February 07, 2020