The ratio of the present ages of a mother and a son is 4: 1. Fourteen years from now, the ratio of their ages will be 2 : 1 The present age (in years) of mother is:
                Mother    Son
Present           4p      1p
After 14 years    4p+14  1p+14
Given  $$\ \frac{\ 4p+14}{1p+14}=\ \frac{\ 2}{1}$$
     4p+14 = 2p +28
       2p = 14
        p = 7
Present Age of Mother = 4p = 4 x 7 = 28 years
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