For the upcoming holiday season, Dorothy wants to mold 20 bars of chocolate into tiny pyramids. Each bar of chocolate contains 6 cubic inches of chocolate. Dorothy plans to make chocolate pyramids with a square base of 1 square inch and a height of 2 inches. What is the largest number of pyramids she can make from the 20 bars of chocolate?
a)240
b)180
c)450
d)520
e)580

please help !

Question

For the upcoming holiday season, Dorothy wants to mold 20 bars of chocolate into tiny pyramids. Each bar of chocolate contains 6 cubic inches of chocolate. Dorothy plans to make chocolate pyramids with a square base of 1 square inch and a height of 2 inches. What is the largest number of pyramids she can make from the 20 bars of chocolate?
a)240
b)180
c)450
d)520
e)580

please help !

sleepyjess · Answer

The answer would be b) 180 because there is 120 cubic inches of chocolate total.
20 x 6 = 120
The volume for a pyramid is 1/3Bh. So the volume for each pyramid is .66 cubic inches. Divide 120 by .66 and you have your number of pyramids.