Khali 3rd AC ke coaches se konsa railway ko profit mil raha hai ulta sleeper se zyada operational cost hai AC ka.
Rameshwaram Humsafar express me 1 sleeper coach hai Jo hamesha full rahta usse railway ko profit milta wahi 18 3rd AC coaches hai jisme se 50% coaches khali hote ..isse railway ko kitna nuksan horaha