contestada

Janice needs to re-shingle the roof of her house. One bundle of shingles costs $35.99 and covers 2.25 m2.

How many bundles of shingles does she need for the roof?

Janice needs to reshingle the roof of her house One bundle of shingles costs 3599 and covers 225 m2 How many bundles of shingles does she need for the roof class=

Respuesta :

taskmasters
To calculate the number of shingles, we first calculate for the total area of the roof of Janice's house. From the figure, we can calculate the area of the two shapes: pyramid and a rectangular prism.

A(pyramid) = lw+l√[(w/2)²+h²]+w√[(l/2)²+h²]
A = 208 m²
A(prism) = 2(wl+hl+hw)
A = 293 m²

Total area = 501 m²

Number of shingles she needs = 501 m² / 2.25 m² = 223