my ans for (a)i ---> 236cm cube.

the given ans is ---> 240 cm cube ?

hu is rite?!? and how to find length of AG?

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- Jun 21st 2006, 10:19 AM #1

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- Jun 21st 2006, 11:38 AM #2Originally Posted by
**xiaoz**

you are dealing with a prism.

$\displaystyle V_{prism}=l\times w\times h$

The base area is 8 cm long and 5 cm wide, that means the area is 40 cm^2. The height of the prism is 6 cm. So

$\displaystyle V_{prism}=8 cm \times 5 cm \times 6 cm=240 cm^3$

The length of the diagonal through the space of the prism is calculated by:

$\displaystyle d=\sqrt{l^2+w^2+h^2}$. Plug in the values you know:

$\displaystyle d=\sqrt{(8 cm)^2+(5 cm)^2+(6 cm)^2}=\sqrt{125 cm^2}=5\cdot \sqrt{5} cm$ $\displaystyle \approx 11.18 cm$

Greetings

EB

- Jun 21st 2006, 04:07 PM #3

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- Jun 21st 2006, 06:08 PM #4

- Jun 22nd 2006, 10:30 AM #5

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- Jun 28th 2006, 12:29 PM #6Originally Posted by
**xiaoz**

the problem b) was done here: http://www.mathhelpforum.com/math-he...ber.php?u=1091

Bye

EB

- Jun 28th 2006, 08:37 PM #7Originally Posted by
**earboth**

I noticed that the link I gave you doesn't work. No Idea why this happens now.

Try this one please instead: http://www.mathhelpforum.com/math-he...ead.php?t=2494

Bye

EB