How many matchboxes of size 4 cm × 3 cm × 1.5 cm can be packed in a cardboard box of size 30 cm × 30 cm × 20 cm ?
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Solution
Volumeof cardboard box = 30 cm × 30 cm = 20 cm = 18000 cm3
Volume of each matchbox = 4 cm × 3 cm × 1.5 cm = 18 cm3 ∴ Number of matchboxes that can fit in the cardboard box = 18000 cm3÷ 18 cm3 = 1000