Q14
12 year old Manick is three times as old as his brother Rahul. How old will Manick be when he is twice as old as Rahul ?
A.
14 years
B.
16 years
AnswerC.
18 years
D.
20 years
Answer: Option B
Solution
Answer: Option B
Solution:
Manick's present age = 12 years, Rahul's present age = 4 years.Let Manick be twice as old as Rahul after x years from now.
Then, 12 + x = 2 (4 + x) ⇔ 12 + x = 8 + 2x ⇔ x = 4.
Hence, Manick's required age = 12 + x = 16 years.