Question

The density of lead is 12 grams per cm3.  A lead brick has a mass of 1.5 kilograms. Its dimensions are 10 cm by 5 cm by 4 cm. Is it:
a) More than 75% hollow
b) Between 50 and 75% hollow
c) Between 25 and 50% hollow
d) Between 0 and 25% hollow

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