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The ratio of age of rahul & vimal 4 yeras ago is 4:3.the ratio of sum & difference of their present age is 9:1.what will be the age of vimal after 4 years |
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Answer» Answer: 20 year Step-by-step explanation: As the ratio is 4:3, LET the age of RAHUL & VIMAL, that time, be 4a and 3a. So, PRESENT age of: Rahul = 4a + 4 Vimal = 3a + 4 In question, = > (sum of their ages):(difference in their ages) = 9:1 = > (4a + 4 + 3a + 4):{4a+4-(3a+4)} = 9:1 = > (7a + 8):(4a + 4 - 3a - 4) = 9:1 = > (7a + 8): a = 9:1 = > 7a + 8 = 9a = > 8 = 9a - 7a = > 8 = 2a = > 4 = a Present age of vimal = 3a + 4 = 3(4) + 4 = 16 year So, after 4 years, age of vimal = 16+4 = 20 year |
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