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)

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

where

----> slant height

substitute the values

step 2

Find the cost

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation: