The roof

The house's roof has the shape of a regular quadrilateral pyramid 5 m high and the edge of the base 7 m. How many tiles with an area of 540 cm2 are needed?

Correct answer:

n =  1583

Step-by-step explanation:

h=5 m a=7 m  h2=(a/2)2+h2=(7/2)2+526.1033 m  S1=2a h2=27 6.103321.3615 m2  S=4 S1=4 21.3615=7 149 m285.4459 m2 S0=540 cm2 m2=540:10000  m2=0.054 m2  n1=S/S0=85.4459/0.0541582.3313  n=n1=1582.3313=1583

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