Number of tiles needed across length of room
= 6.5m / 25cm
= 650cm / 25cm
= 26 tiles
Number of tiles needed across breadth of room
= 5m / 25cm
= 500cm / 25cm
= 20 tiles
Total number of tiles needed
= 26 * 20
= 520 tiles
Cost of flooring the room
= Rs9.40 * 520
= RS 4888