Cloth / textile
We have cloth measure 16 square meters. How many 20 cm by 20 cm by 8 cm bags you can make? Assume bag is a cuboid without one top base.
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The bag is a block with a sidewall of 20x20 cm and a depth of 8 cm. The bag on top has no cloth, i.e., it is enough to sew a 30 cm x 8 cm strip of material to the two side walls. Otherwise, it would not be a bag but a closed pillow — an example of conversions of area units, its division by the surface of a block without one wall.
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