Present ages of A and B are 50 years and 18 years respectively. In how many years will A be twice as old as B?
a) 14 years
b) 15 years
c) 16 years
d) 18 years
e) None of these
Let the required time be x years.
then (50+x) = 2 (18 + x) = 50 + x = 36 + 2x x = 14 years.
Alternative method : Double of B’s age = 2 × 18 = 36 years
difference between A’s present age and double of B’s age = 50 – 36= 14 years.
A will be twice of B’s age after 14 years.
Answer: a)