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| PAGE: 445 | SET: Exercises | PROBLEM: 79 |
The bulding construction as a concret section.
Consider equation is 
and 
.
(a)
Find the area.
Find the area of the face of the section superimposed on rectangular coordinate system.
Observe the figure:
The figure is symmetric about 
-axis.
The area of the face as rectangular shape is 
.
square meters.
The area is 
sq-meters.
(b)
Find the volume of the concrete.
Volume 
.
Substitute 
in the volume formula.
The volume of face of the section is 
cubic-meters.
(c)
Find weight of the section.
The weight of the face of the section is 
.
(a) The area of the face of the section is sq-meters.
(b) The volume of face of the section is cubic-meters.
(c) The weight of the face of the section is 
.
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