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 $4B=5C$ $\Rightarrow \frac{A}{B}=\frac{3}{2}$ and $\frac{B}{C}=\frac{5}{4}$$\Rightarrow\frac{A}{C}$ $=\frac{A}{B}\times\frac{B}{C}$ $= \frac{3}{2}\times\frac{5}{4}$ $\Rightarrow A:C = 15:8$.