GATE Computer Science (CS) 2014 Shift 1 Solved Paper

Consider a token ring network with a length of 2 km having 10 stations including a monitoring station. The propagation speed of the signal is 2 × 10⁸ m/s and the token transmission time is ignored. If each station is allowed to hold the token for 2 μ sec, the minimum time for which the monitoring station should wait (in μ sec) before assuming that the token is lost is _______