Classic tent

The tent has the shape of a triangular prism. The front and rear walls are isosceles triangles with a height of 18 dm and arms 19.5 dm long. The tent is 1.5 m wide and 2 m long. How many square meters of fabric is needed to make a tent? How much air is in it?

Correct result:

S =  10.5 m2
V =  2.7 m3

Solution:

v=18 dm m=18/10  m=1.8 m r=19.5 dm m=19.5/10  m=1.95 m a=1.5 m l=2 m  S1=v a2=1.8 1.52=2720=1.35 m2 S=2 S1+2 r l=2 1.35+2 1.95 2=212=212 m2=10.5 m2
V=S1 l=1.35 2=2710=2710 m3=2.7 m3



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