pls edit ur post that "this train will start after Mumbai Rajdhani say after a 20 min Gap and follow Mumbai Rajdhani TT and will also reach NDLS with same time gap of 20 mins."here if u see in above 2 trains
rajdhani startsat around 4:40 pm from mumbai whereas spl ac starts at 7:45pm gap is 3 hr so gap of 20mn from dept stands FALSE plus it rajdhani reaches morning 8:30am one of the fastest trains of ir and ac spl reaches at evening 5:30 again post of "gap of 20 mn is "FALSE
thanks