Quadrilateral 15023

The regular quadrilateral pyramid has a base circumference of 44 cm and a body height of 3.2 cm. Calculate its volume and surface.

Correct answer:

V =  1290.6667 cm3
S =  835.3228 cm2

Step-by-step explanation:

o=44 cm h=3.2 dm cm=3.2 10  cm=32 cm  a=o/4=44/4=11 cm  S1=a2=112=121 cm2  V=31 S1 h=31 121 32=33872 cm3=1290.6667 cm3
h2=h2+(a/2)2=322+(11/2)232.4692 cm  S2=2a h2=211 32.4692178.5807 cm2  S=S1+4 S2=121+4 178.5807=835.3228 cm2

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