Question

The age of fther is thrice the sum of ages of their children .after 3 years his age will be only double of the sum of ages of his three children.find present age of father

Answer 1

Children's age = x + y  + z

Father's age = 3(x+y+x)

After 3 years children's age = x + 3 + y + 3 + z + 3 = x + y + z + 9

After 3 years Father's age = 3(x+y+z) + 3 or  2(x+y+z+9)

3x + 3y + 3z + 3 = 2x + 2y + 2z + 18

x + y + z = 15

Present age of the father = 3(x+y+z) = 3 x 15 = 45