tlg bntuanya, pkai cra ya..mksih kaka

Luas 1 keramik = 40 x 40 = 1.600 cm
Lebar ruangan = 3/4 x p
= 3/4 x 8 = 6 m
Luas ruangan = p x l
= 8 m x 6m
= 48 m^2 = 480.000 cm^2

Banyak keramik = Lruangan/Lkrmik
= 480.000/1.600
= 300 buah

8m×(3/4×8m)=8m×6m=48m=480000cm2
40cm×40cm=1600cm2=480000:1600=300buah