Jawabanmu

2014-06-13T18:43:07+07:00
= 200cm.320cm
= 64000cm << luas lantai

luas 1 ubin = 20.20 = 400

banyak ubin yang diperlukan
= 64000/400
= 160 ubin

2014-06-13T18:52:54+07:00
Luas lantai=200cm*320cm
=64000cm
luas ubin =20cm*20cm
=400
banyak ubin=6400:400
=160 ubin



semoga bermanfaat ya;)