The ratio of present age of A to B’s is 3 : 2. Five years ago, A age was twice…
2025
The ratio of present age of A to B’s is 3 : 2. Five years ago, A age was twice than that of B age at that time. Five years hence, sum of ages of A and B is equal to C age at that time. Find present age of C (in years)?
- A.
35
- B.
40
- C.
20
- D.
25
- E.
30
Attempted by 13 students.
Show answer & explanation
Correct answer: E
Define the present ages:
The ratio of A's age to B's age is 3:2. Let A = 3x and B = 2x.
Use the past condition:
Five years ago, A's age was (3x - 5) and B's age was (2x - 5).
The condition states: "A age was twice than that of B age at that time."
Equation: (3x - 5) = 2 * (2x - 5)
3x - 5 = 4x - 10
x = 5
Determine current ages of A and B:
A's present age = 3 * 5 = 15
B's present age = 2 * 5 = 10
Use the future condition:
"Five years hence, sum of ages of A and B is equal to C age at that time."
A's age in 5 years = 15 + 5 = 20
B's age in 5 years = 10 + 5 = 15
Sum = 20 + 15 = 35
So, C's age five years hence will be 35.
Calculate C's present age:
If C is 35 five years from now, C's present age = 35 - 5 = 30.
The correct answer is 30, which corresponds to Option 5.