Rectangular base pyramid

Calculate an area of the shell of the pyramid with a rectangular base of 2.8 m and 1.4 m and height 2.5 meters.

Correct result:

S =  11.2807 m2

Solution:

h=2.5 m a=2.8 m b=1.4 m  h1=h2+(b/2)2=2.52+(1.4/2)22.5962 m h2=h2+(a/2)2=2.52+(2.8/2)22.8653 m  S1=a h12=2.8 2.596223.6346 m2 S2=b h22=1.4 2.865322.0057 m2  S=2 S1+2 S2=2 3.6346+2 2.0057=11.2807 m2



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