Find the best solutions to your problems with the help of IDNLearn.com's expert users. Find the solutions you need quickly and accurately with help from our knowledgeable community.

The breadbox is a composite figure. What is the surface area of the breadbox to the nearest square inch? Round to the nearest square inch.

This breadbox has a surface area of _________in.^2



The Breadbox Is A Composite Figure What Is The Surface Area Of The Breadbox To The Nearest Square Inch Round To The Nearest Square Inch This Breadbox Has A Surf class=

Sagot :

you find the area of each face and add them all together

the front facing square is 8 by 8
so 8 * 8 = 64
and on the back of it there is a opposite but same square
so 64 + 64 so far

then the left facing rectangle is 8 by 16
8 * 16 = 128
and the top facing rectangle is the same size
so we have in total  64+64+128+128 sofar

then here's a little confusing...
the bottom facing we can consider to be a square of (8+8) by 16
so (8+8) * 16 = 256
so we now have  64+64+128+128+256

the surface area of a cylinder (which is what the rounded part is)
is  2*(area of circle) + (circumference of circle)*(height)
= 2*(pi * 8 * 8) + (16 pi)*(16) = 384 pi
then divide this number by 4 because we have only a fourth of the full cylinder
384 pi / 4 = 96pi

that gives us a total of
64+64+128+128+256+96pi
= 640 + 96pi
= 941.59  (if using "real" pi) = 942
or
941.44 (if using "3.14" pi) = 941 <- answer

Answer:

i think you have to subtract 16*8 from 941