If A and B are in the ratio of 3:4 and the ratio of B and C is 12:13 then A and C will be the ratio of:

by

A. 8:10
B. 9:13
C. 12:16
D. 7:15

🧠 Explanation (Math):

Given: A:B = 3:4 and B:C = 12:13; find A:C
Step 1: Match B by scaling 3:4 to B=12 ⇒ multiply by 3 ⇒ A=9, B=12
Step 2: From B:C, C=13 when B=12 ⇒ A:C = 9:13
Final Answer: 9:13