The roof

The roof of the tower has the shape of a regular quadrangular pyramid, the base edge of which is 11 m long and the side wall of the animal with the base an angle of 57°. Calculate how much roofing we need to cover the entire roof, if we count on 15% waste.

Correct answer:

x =  255.4903 m2

Step-by-step explanation:

a=11 m α=57° rad=57° 180π =57° 1803.1415926 =0.99484=19π/60  q=100%+15%=1+10015=1.15  cosα=a/2:h1  h1=a/2/cosα=11/2/cos0.994810.0984 m  S1=2a h1=211 10.098455.5414 m2  x=4 S1 q=4 55.5414 1.15=255.4903 m2

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