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Verified answer
4m=400 cm3m=300 cm
50cm×50cm =2500cm
jadi ,,, banyaak ubin =Luas ruangan /luas ubin
=400×300/2500
=120000/2500 =48 buah ,, sorry if I fault
Luas ruangan = p x l = 4 m x 3m = 12m² = 120.000cm²
Luas ubin = s x s = 50cm x 50cm = 2.500cm²
Banyak ubin = Luas ruangan : luas ubin
= 120.000cm² :2.500cm²
= 48