The ratio of two numbers a and b is 3:5. If 2 is added to both the numbers, the ratio becomes 2:3. Find b.

by

A. 7
B. 10 
C. 6
D. 25

🧠 Explanation (Math):

Given: a:b = 3:5; adding 2 to both gives 2:3; find b
Step 1: Let a = 3k, b = 5k
Step 2: (3k + 2) : (5k + 2) = 2 : 3
Step 3: Cross-multiply: 3(3k + 2) = 2(5k + 2) ⇒ 9k + 6 = 10k + 4
Step 4: Solve k = 2 ⇒ b = 5k = 10
Final Answer: 10