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January 30, 2015

January 30, 2015

Posted by **Es- CAN ANYONE HELP?** on Tuesday, March 19, 2013 at 8:48am.

The Homework question is: There is a picture with stacked cubes that are each 2inches.

+

++

+++

++++ +=the pic i have of cubes=(+=2in cube)

Each side of a cube in the diagram measures 2 inches. What is the total surface area and volume of the solid?

I did A=s squared A=2 squared

A= 4inch squared

SA= 4(36)= 144inch squared

V=lw10

v=2(2)10 = 40 inch cubed

is this correct?

These are the numbers I got to plug into the formula

front and back of the tower=20

side=4 bottom=4 side#2=4 top=4

all together =36, this is how I came up with my numbers. Hopefully, I did it correctly. Thanks for checking this

- Math -
**bobpursley**, Tuesday, March 19, 2013 at 8:54amNo, it is very wrong. If there are 10 cubes (I count 11 in the picture), the volume is 10x the volume of a single cube. The volume is not 2*2

For SA, count the faces showing on all sides. Did you count the bottom faces?

- Math -
**ES PUZZLED**, Tuesday, March 19, 2013 at 9:22amWhen you count all the faces it is 36.

I used that for the Sa=s^2(times the number of faces on all sides)

SA=4(36)=144in^2

but the V=bh is where I am confused

V=s^3 I used2 giving me 8in^3

so now when you plug in8 in the equation

TV=8(10) is this correct or is this where it would be 8(36)

36 being all the cubes surfaces???

Thank you for trying to help explain this to me, if you can actually understand what I wrote

- Math -
**bobpursley**, Tuesday, March 19, 2013 at 9:58amtv=80, if in fact the edges of the cubes are 2, and there are 10 of them.

I cant count the faces, as I do not know how they are stacked.

- Math -
**ES PUZZLED**, Tuesday, March 19, 2013 at 10:04amok thank you.

They were supposed to be10, 2 inch cubes but i didn't know another way to draw them.

Thank you for the help

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