Question

Please help!! Question-The roof of a building is in the shape of a square pyramid 25 m on each side. If the slant height of the pyramid is 18 m, how much will roofing material cost at $10.23 per sq m (Round to the nearest whole number)

Answer 1

Answer:

$\ 9,207$

Step-by-step explanation:

step 1

Find the lateral area

we know that

The lateral surface of a square pyramid is equal to the area of its four lateral triangular faces

so

$LA=4[\frac{1}{2}bh]$

where

$b=25\ m$

$h=18\ m$ ----> slant height

substitute the values

$LA=4[\frac{1}{2}(25)(18)]=900\ m^{2}$

step 2

Find the cost

$900(10.23)=\ 9,207$