Tray Tables which you cannot use

Mathematics & railway amenities? One may wonder what has mathematics got to do with Railway amenities? This is just a refresher course... Comfort =  Lower amenities/ High Price. Where is the maintenance department? Several tray tables are useless in Chennai - Coimbatore Intercity & Kovai express trains, sometimes, making us wonder what are we paying for? Where is the profit of Tatkal reservations? We do cancel Tatkal tickets for which cancellation monies are not refunded to the commuter, then where does it go and how is it utilised? Public Grievances, Southern Railway