Question

sum of the present ages of Ravi and Kishan 69 years if 8 years ago Ravi age was 4 years less than double the age of Kishan find the difference between their present ages (in years)

Answer 1

Present

Ravi = x

Kishan = y

x + y = 69

x = 69 - y  .........(1)

8 years ago

kishan = y - 8

Ravi = 2(y-8) - 4

x - 8 = 2y - 16 - 4

69 - y - 8 = 2y - 20

3y = 81

y = 27

x = 69 - 27 = 42

Rav's age = 42years

Kishan's age = 27years

difference between their age = 42 - 27 = 15years