Given : 3m 25cm long and 2m 50cm broad Room = 325cm and 250cm
Tile size should be of dimension which fit perfectly in room according to dimension ,
$\therefore$ HCF(325,250) = 25
$No \ of \ tiles= \frac{Area \ of \ room}{Area \ of \ tile}$
$No \ of \ tiles$ = $\frac{325*250}{25*25}$ =130