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  1. The ratio of age of two boys is 5 : 6. After two years the ratio will be 7 : 8. The ratio of their age after 12 years will be
    1. 22
      24
    2. 15
      16
    3. 17
      18
    4. 11
      12
Correct Option: C

The present age of boys are 5x and 6x years respectively.
After 2 years,

5x + 2
=
7
6x + 28

⇒  42x + 14 = 40x + 16
⇒  2x = 2 ⇒ x = 1
Ratio after 12 years
⇒  5x + 12 : 6x + 12 = 17 : 18



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