We know the following details:
From the given clues, the arrangement of the friends in the row is as follows:
A, Q, R, S, T, P, N, O, M.
Thus, the person sitting between P and M is N.
Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?