Posted by **Just a question** on Wednesday, February 29, 2012 at 10:46pm.

The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?

if the pyramid has 4 sides does each side have 18m?

- math11 -
**Damon**, Wednesday, February 29, 2012 at 10:53pm
You have four triangles of base 18 and altitude 12

area = 4 * (1/2) * 18 * 12

multiply area by 5.75 to get cost

- math11 -
**bobpursley**, Wednesday, February 29, 2012 at 10:54pm
area roof= 4*1/2 * 18*12

cost= area * $5.72 That is pretty cheap roofing, about 50cents/square foot.

- math11 -
**Just a question**, Thursday, March 1, 2012 at 2:48am
thanks

## Answer This Question

## Related Questions

- math - The roof of a building is shaped like a square pyramid, with a base of ...
- geometry - The roof of a building is shaped like a square pyramid, with a base ...
- math - The roof of a building is shaped like a square pyramid, with a base of ...
- math - The Transamerica Pyramid in San Francisco is shaped like a square pyramid...
- geometry - The Transamerica Pyramid in San Francisco is shaped like a square ...
- Physics Gr.11 - Frank stands at the base of a building. He throws a 0.12kg rock ...
- physics - Frank stands at the base of a building. He throws a 0.12kg rock ...
- Math - To reduce the loading from snow on the roof, a ski chalet design calls ...
- math - This is a floor plan of a building that is 8m tall. It has a flat roof. ...
- science - What is the final velocity? V1=18m/s a=-4 m/s2 (add it in even though ...

More Related Questions