A is 4 years old and B is thrice of A. When A is 12 years, how old will B be ?
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A is 4 years old and B is thrice of A. When A is 12 years, how old will B be ?
- A.
16
- B.
20
- C.
24
- D.
28
Attempted by 40 students.
Show answer & explanation
Correct answer: B
Given: A is 4 years old and B is thrice A, so B = 3 × 4 = 12.
Step 1: Find the age difference between B and A: 12 − 4 = 8 years.
Step 2: Determine how many years later A will be 12: 12 − 4 = 8 years later.
Step 3: Add the same number of years to B's current age: 12 + 8 = 20.
Answer: When A is 12 years old, B will be 20 years old.