Zinc has a density of 0.258 lb/in³ (pounds per cubic inch).

Darius is making a pyramid out of solid zinc. The pyramid has a square base 5 inches on each side, and a height of 3.3 inches.

How many pounds of zinc does he need?

Show all your work. Do not round the final answer.

BellaNight7310 Jan 31, 2019

#1**+3 **

Have a look at http://mdk12.msde.maryland.gov/instruction/curriculum/hsa/geometry/math_reference_sheet.html to see the formulae for calculating the volume of various shapes (including a square based pyramid).

For this question note that mass = density*volume.

Alan Jan 31, 2019