Treść zadania
Autor: marcinp122 Dodano: 5.5.2010 (19:44)
Ile co najmniej rolek tapety należy kupić do wytapetowania ścian pokoju,którego podłoga jest kwadratem o boku 4.2m a wysokość wynosi 2.6m.W pokoju znajduje się okno o wymiarach 1.5m x 1.6m,drzwi balkonowe dwuskrzydłowe o wymiarach 2,2m x 1,6m oraz drzwi o wymiarach 0.9m x 2m.Jedna rolka zawiera 11m Kwadratowych tapety..
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emilka1992 5.5.2010 (19:47)
najpierw obliczymy ile m kwadratowych tapety potrzeba na ściany,a potem odejmiemy to,co odpadnie na okno i drzwi
4(4,2mx2,6m)=4x1o,92m =123,68m kw.
odliczamy okno 1,5mx1,6m=2,4mkw
odliczamy drzwi 2mx0,9m=1,8mkw
123,68 - 2,4 -1,8=109,48
rolka ma 11mkw to 109,48 :11=9,95...
odp.Trzeba kupic 10 rolek tapety.
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