I am out of station ka meaning?

In the given sentence, identify the segment which contains the grammatical error. Preeti is absent from the meeting due to she is out of station. (a) Preeti is absent (b) due to she is (c) from the meeting (d) out of station

A train X departs from station A at 11.00 am for station B, which is 180 km away. Another train Y departs from station B at 11.00 am for station A. Train X travels at an average speed of 70 kms/hr and does not stop any where until it arrives at station B. Train Y travels at an average speed of 50 kms/hr, but has to stop for 15 minutes at station C, which is 60 kms away from station B enroute to station A. Ignoring the lengths the train , what is the distance , to the nearest km, from station A to the point where the trains cross each other?

I am done for.

What are the band widths of an A.M. radio station and an FM radio station?