B and C are points on straight line AD, on which AB=BC=CD. What percent of AC is AD ?
A
1.5%
B
50%
C
66.67%
D
150%
Correct Answer: 150%
A-----B-----C-----DLet, AB=BC=CD=xAC = AB + BC = x+x = 2xAD = AB + BC+CD = x+x+x = 3x let, AC * P% = AD(2x * P)/100 = 3xP = 150 % (Ans)