Question
Rohan's present age is 3/7 times the age of his mother.
After four years, he will be one- half of the age of his mother. How old is his mother at present?Solution
Rohan                              Mother 3                                       7 After 5 years ATQ- 3x+4 =(7x+4)/2 6x+8=7x+5 X=3 Present age of mother =7×3=21years.
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