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P=33,88m2
Powierzchnia rolki:
55cm*1/100=0,55m
P=0,55m x 10 m = 5,5 m2
33,88m2 : 5,5 m2 =6,16
Aby wytapetować pokój potrzeba 7 rolek tapety.
*-mnożenie
ściana- 2*(4,4m*2,2m)+2*(3,3m*2,2m)=33,88m/2
tapeta-55cm*10cm=550cm/2=5,5m/2
33,88/2:5,5m/2=6,16
odp:Pan Mariusz powinien kupić 7 rolek tapety.