The total age of A and B is 12 years more than the total age of B and C. C is how many year younger than A

19. Ratio of ages of three persons is 4:7:9, Eight years ago, the sum of their ages was 56. Find their present ages.

Dinesh was twice as old as Ajay 10 years back. How old is Ajay today if Dinesh will be 40 years old 10 years hence

15 years ago the average age of a family of four members was 40 years. Two children were born in this span of 15 years. The present average of the family remains unchanged. Among the two children who were born during the 15 years, if the older child at present is 8 years older than the younger one, what is the ratio of the present age of the older child to the present age of the younger Child?

A rectangular mat has an area of 120 sq.metres and perimeter of 46 m. The length of its diagonal is: