Question

At present, a mother is 3 times older than her son. After 5 years, the sum of their ages will be 70 years. The age of the mother after 10 years will be
(A) 40
(B) 55
(C) 45
D) 60

Answer 1

today age sum = 70 - 10 = 60

son = X year

mother = 3X

X + 3X = 60

4X = 60

X = 60/4 = 15 yers

today mother age is

3x = 45 year

after 10 year

age will be 55 yers