Question

The density of a certain material is such that it weighs 4 kilograms per cubic foot of volume. Express this density in ounces per cubic meter

Answer 1

4 kilograms per cubic foot of volume:
1 kg = appr 35.274 ounces
1 cubic foot = appr 0.0283168 cubic metres

so
4 kilograms per cubic foot
= 4(35.274)/.0283168 ounces/m^3
= ....

(What a silly question, who would mix metric units with non-metric units?)

Answer 2

or, if you don't have those handy conversion factors, use the ones you probably know by heart:

4kg/ft^3 * 2.2lb/kg * 16oz/lb * (1ft/12in * 1in/2.54cm * 100cm/m)^3
= 4972.305 oz/m^3

Answer 3

It's a Deltamath question so it should your correct answer.