Which of the following represents ab = 64?

A. 8 : a = 8 : b

B. a : 16 = 6 : 4

C. a : 8 = b : 8

D. 32 : a = b : 2

E. None of these

Answer: Option D

Solution(By Examveda Team)

A = 8 : a = 8 : b ⇒ 8a = 8b ⇒ a = b.
B = a : 16 = b : 4 ⇒ 4a = 16b ⇒ a = 4b
C = a : 8 = b : 8 ⇒ 8a = 8b ⇒ b = a
D = 32 : a = b : 2 ⇒ ab =64