Two identical blocks `A` and `B` are placed on a rough inclined plane of inclination `45^(@)`. The coefficient of friction between block `A` and incline is `0.2` and that of between `B` and incline is `0.3`. The initial separation between the two blocks is `sqrt(2)m`. The two blocks are released from rest, then find the time (in sec) after which front faces of both blocks come in same line.