As per AS-2, The text is:
Inventories are assets:
(a) held for sale in the ordinary course of business;
(b) in the process of production for such sale; or
(c) in the form of materials or supplies to be consumed in
the production process or in the rendering of services.
So in case of plates and glasses of the mentioned hotel,the points (a) and (b) are not applicable. Seeing the point (C) glass and cutlery will not be used as raw materials to give WIP or Finished goods of cutlery. Similarly it cant constitute for service and be transferred to trading A/c as the info given is that the assets are used to derive benifit for a longer period(dep. provided in question) so they have considered as FA and they want to allocate the cost in different years as per matching concept.