a=5m
b=4,7m
c=2,5m
P=2*Pp+Pb
P=2*a*b+2*a*c+2*b*c
P=2*5m*4,7m+2*5m*2,5m+2*4,7m*2,5m
P=47m²+25m²+23,5m²
P=95,5m²
95,5m²*2=191m²
15m²-->1l
191m²---->x
x=191m²*1l/15m²
x≈13 puszek
5m*4,7m=23,5m 5m*2,5m=12,5m 2,5m*4,7m=11,75m
23,5m+12,5m+11,75m=47,75m kwadratowych 47,75m*2=95,5m kwadratowych
95,5m / 15 =6,366666666666l zaokrąglić do 7l na pomalowanie pokoju trzeba użyć 7litrów farby
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a=5m
b=4,7m
c=2,5m
P=2*Pp+Pb
P=2*a*b+2*a*c+2*b*c
P=2*5m*4,7m+2*5m*2,5m+2*4,7m*2,5m
P=47m²+25m²+23,5m²
P=95,5m²
95,5m²*2=191m²
15m²-->1l
191m²---->x
x=191m²*1l/15m²
x≈13 puszek
5m*4,7m=23,5m 5m*2,5m=12,5m 2,5m*4,7m=11,75m
23,5m+12,5m+11,75m=47,75m kwadratowych 47,75m*2=95,5m kwadratowych
95,5m / 15 =6,366666666666l zaokrąglić do 7l na pomalowanie pokoju trzeba użyć 7litrów farby