Milk cartons

How much paper do we need for 12 tetra pack with dimensions 6 cm, 11 cm and 20 cm? Will 1 liter of milk fit in the box?

Correct result:

S =  9744 cm2
x =  1

Solution:

n=12 a=6 cm b=11 cm c=20 cm  S1=2 (a b+b c+c a)=2 (6 11+11 20+20 6)=812 cm2  S=n S1=12 812=9744 cm2
V1=1 l cm3=1 1000  cm3=1000 cm3 V2=a b c=6 11 20=1320 cm3  V1<V2 x=1



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