1) If 2A=3B and 4B=5C, then A:C is : A) 15:8 B) 15:7 C) 7:15 D) 12:4 E) 12:15 Answer: Option AExplanation:2A=3B and 4B=5C ⇒(AB) =(32) and (BC) =(54) ⇒AC =(AB×BC) =(32×54) =158 ⇒A:C=15:8.