Question

PLEASE HELP!!

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 the pyramid is 16 cm. To get the wax for the candle, Devin melts cubes of wax that are 4 cm by 4 cm by 4 cm. How many of the wax cubes will Devin need to make the candle? Round you answer to the nearest whole cube and show your work.

Answer 1

pyramid volume: 1/3 b h = 1/3 (9^2)*10=270 cubic centimeters
Cube volume: 4*4*4=64
270/64=4.2
so Devin needs to melt 5 cubes