Question

Sum of a and b age is 51 .After 3 year ratio of their ages become 9:10.What present age of a?

Answer 1

a+b=51
b=51-a
A.T.Q.,
a+3 9
-------------- =. - - - - -
51-a+3 10

10a+30 = 9(54-a)
10a=486-9a-30
10a+9a=456
19a=456
a=456/19
a=24

Ans: age of a=24