math11
posted by Just a question .
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?

You have four triangles of base 18 and altitude 12
area = 4 * (1/2) * 18 * 12
multiply area by 5.75 to get cost 
area roof= 4*1/2 * 18*12
cost= area * $5.72 That is pretty cheap roofing, about 50cents/square foot. 
thanks
Respond to this Question
Similar Questions

Chandra
A building is the shape of an airplane hanger (a half cylinder). Construction for the foundation (rectangular part) costs $30 per square foot, the sides (semicircle bases) cost $20 per square foot and the roofing cost $15 per square … 
physics
A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.48 s for the tile to pass between two windowsills that are 3.0 m apart. How far is the sill of the upper window from … 
Physics
A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.42 s for the tile to pass between two windowsills that are 3.08 m apart. How far is the sill of the upper window … 
Physics
A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.42 s for the tile to pass between two windowsills that are 3.08 m apart. How far is the sill of the upper window … 
College Physics
A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.35 s for the tile to pass between two windowsills that are 2.45 m apart. How far is the sill of the upper window … 
geometry
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? 
math
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? 
math
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? 
math
The Transamerica Pyramid in San Francisco is shaped like a square pyramid. It has a slant height of 856.1 feet and each side of its base is 145 feet. Find the lateral area of the building. 
maths
a pavilion has a roof shaped like a right hexagonal pyramid with a height of 1.9m the sides of the base are 3,5 m long. what is the area of the roof maths gr 11