Question

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Answer 1

The mass of the cube with length of 2cm is $320g$

• We were given length of cube as $2cm$

To know the volume of cube we can use the expression

Volume of cube = $a^{3}$

Where a= length of cube=$2cm$

Then volume of the cube $2^{3} = 8 cm.$

• Density was given as $( \frac{40g}{ cm^{3} } )$

But we know that density is the ratio of mass to the volume of a substance.

• Then$Density= \frac{ mass }{ volume }$

But we are looking for mass of the object, the we can make Mass as subject of the formula

• $Mass= density * volume$

Them substitute the values

• $Mass = (40 * 8)$

$= 320g$

Therefore mass of the cube is $320g$

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