Complex sentence: It previously ran between Howrah and Rampuhat, and was later extended to run to Azimganj; it covers 278 Kilometers distance at an average speed of 42 Kmph.
Split into simpler sentences: It previously ran between Howrah and Rampuhat, and was later extended to run to Azimganj. It covers 278 Kilometers distance at an average speed of 42 Kmph.