Present age of Farzana is thrice the present age of Samira who is How many years ago were the age of Farzana five times that of Samira?

A 3

B 10

C 7.5

D 6

Correct Answer: Option B

samiras age=20 farzanas age=60 suppose, x years ago farzana was five times of samira according to question, (20-x)5=60-x or,4x=40 or,x=10