Can someone answer this last question for me? Also please keep the rude comments to yourself. No, I am not a incredibly smart mother but I am a good one. I am just trying to help my daughter out with her work.
5: A marble monument is made in the form of a square pyramid. The edge of the base measures 2.35 feet and the altitude is 9.65 feet. Find the weight of the monument if the marble weighs 250 pounds per cubic foot.
Tip: Find the volume. Multiply the volume by 250 to find the total weight.
4441 lbs.
3500 lbs.
3758 lbs.
4057 lbs.
2006-11-07 05:52:12 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
If your daughter doesnt understand her homework you really should have a word with her tutor...doing it for her really isnt helping...
2006-11-07 06:00:10 · answer #1 · answered by geordie.lady 6 · 1⤊ 1⤋
The answer is: 4441.01041665 pounds.
The area of a pyramid is 1/3 of the area of the base times the altitude. You get the area of the base by squaring the 2.35... that gives you 5.225. Divide that by 3 and that gives you 1.84083333333. Multiply that times the altitude 9.65 and that gives you 17.76404166666. That's the volume in cubic feet. Multiply that by 250 and you get the answer above.
2006-11-07 14:29:24 · answer #2 · answered by Kasie Faith 2 · 0⤊ 1⤋
4441.01041665 pounds.
The area of a pyramid is 1/3 of the area of the base times the altitude. You get the area of the base by squaring the 2.35... that gives you 5.225. Divide that by 3 and that gives you 1.84083333333. Multiply that times the altitude 9.65 and that gives you 17.76404166666. That's the volume in cubic feet. Multiply that by 250 and you get the answer above.
2006-11-07 14:05:56 · answer #3 · answered by Anonymous · 0⤊ 1⤋
The volume of a Pyramid = (length x width x height)/3
This pyramid has a square base, so length = width
So vol = (2.35 feet x 2.35 feet x 9.65 feet)/3 = 17.764 feet^3
Weight = volume x density = 17.764 feet^3 x 250 lb/feet^3
Weight = 4441 lbs
PS - If people make rude comments instead of answering your questions in a nice manner, you should report them to Yahoo.
2006-11-07 14:00:39 · answer #4 · answered by ohaqqi 2 · 0⤊ 1⤋
Hi. Sorry someone was rude. Usually means they don't have a good answer. Try this link for info on square pyramids. : http://mathworld.wolfram.com/SquarePyramid.html
2006-11-07 13:56:40 · answer #5 · answered by Cirric 7 · 0⤊ 0⤋
(2,35 x 2,35 x 9,65)/3 = 17,764 feet^3
250 x 53,29 = 4441 lbs
2006-11-07 13:59:22 · answer #6 · answered by bogus 3 · 0⤊ 1⤋