Pyramid-shaped 7820

The pyramid-shaped tent has a square base with a side size of 2.2m and a height of 1.8m. How many square meters of tent canvas are needed to make it if we count an extra five percent for the foundation?

Correct answer:

S =  14.8279 m2

Step-by-step explanation:

a=2.2 m h=1.8 m  s=h2+(a/2)2=1.82+(2.2/2)22.1095 m  S1=a s/2=2.2 2.1095/22.3205 m2  S=1.05 (a2+4 S1)=1.05 (2.22+4 2.3205)=14.8279 m2

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