obshaia ploshad' komnati 5,5*6=33m^2;
ploshad' odnoi doshechki:0,3*0,05=0,015m^2 (tak kak 30sm=0,3m,a 5sm=0,05m);
togda kolichestvo doshechek=33/0,015=2200.
Otvet:2200 doshechek.
