or Question 1: ___ of 5 points)
1.
Devin is making a candle by pouring melted wax into
a mold in the shape of a square pyramid. Each side
of
the base of the pyramid is 9 cm and the height of t
he pyramid is 10 cm. To get the wax for the candle,
Devin
melts cubes of wax that are each 4 cm by 4 cm by 4
cm. How many of the wax cubes will Devin need in or
der
to make the candle? Show your work.
You need to calculate the volume of the pyramid and the volume of the cubes to calculate how many cubes you need. Volume of a pyramid = length * width * height / 3 = 9 * 9 * 10 / 3 = 810 / 3 = 270. The volume of each cube is 4 x 4 x 4 = 64. To determine how many cubes you need you take 270 / 64 which equals 4.2 which means you need 5 cubes to make a pyramid.
