Provide your best answer for the following math problem. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The problem is: ratio between rahul and deepak is 4 : 3 , after 6 years rahul age will be 34 years . what is deepak present age ?
21
25.2.