Question

mohans mother is 20 years older than him. seven years ago, she was three times as old as mohan was then. find their present age

Answer 1

Mohan's age = a

Mother's age = 20 + a

7 years back

Mohan's age = a - 7

Mother's age = 3 (a-7)

20+ a - 7 = 3(a-7)

13 + a = 3a  - 21

2a = 34

a = 17

Mohan's present age = 17

Mohan's mother's age = 37                 (20 +17)