The ratio of the present ages of two boy...

The ratio of the present ages of two boys is `3:4`. After 3 years, the ratio of their ages is equal to will be `4:5`.The ratio of their ages after 21 years will be

A

`14:17`

B

`17:19`

C

`11:12`

D

`10:11`

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The correct Answer is:

D

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KIRAN PUBLICATION-RATIO AND PROPORTION -TYPE-IV

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