1) If 2A=3B and 4B=5C, then A:C is : A) 11:7 B) 12:9 C) 15:8 D) 14:7 E) 15:7 Answer: Option CExplanation:2A=3B and 4B=5C ⇒AB=32 and BC=54⇒AC =AB×BC =32×54 ⇒A:C=15:8.