Question

For a snow sculpture content, snow is packed into a cube-shaped box with an edge of 8 feet. The box is frozen and removed, leaving a cube of snow. One cubic foot of snow weighs about 30 pounds. You can estimate the weight ( in pounds) of the cube using the expression 30v where v is the volume (in cubic feet) of the snow. About how much does the uncarved cube weigh?
A. 240 lbs B. 1920lbs C. 15,360 lbs D.216,000

Help me i don't understand the question
The cube of snow has a volume of 8by8by8 = 512 cubic feet
One cubic foot weighs 30 lbs, so 512 cu feet weigh
512 x 30 = 15360 lbs
wait, how do you know its 8by8by8? can you explain it to me please
by definition a "cube" has 6 equal square faces

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