View Full Version : can someone check my math???

Terminator

06-13-2003, 02:17 AM

okay i have a box that is flat in the front, top, bottom and sides but the back is slanted (fits perfect in my trunk) anyway, can someone tell me the volume of my box. its made of 3/4" MDF. the dimensions are:

front height: 14"

bottom width: 14"

top width: 8"

front width: 27"

slant length: 15"

fantomas

06-13-2003, 02:29 AM

about 3.7814 cuft someone else should double check that though...

Terminator

06-13-2003, 02:39 AM

dammit. i got 2.41 ft^3 without taking off the 3/4" all around.

anyone else???

fantomas

06-13-2003, 02:40 AM

mine was after account for 3/4" mdf....and of course before driver displacement...

Trixter

06-13-2003, 11:50 AM

When using 3/4" these measurements become:

front height: 14" = 12.5

bottom width: 14" = 12.5

top width: 8" = 6.5

front width: 27" = 25.5

So let's do the rectangle first:

12.5 x 12.5 x 25.5 / 1728 = 2.31

And now the triangle: (w/ the base being 6 ((12.5 - 6.5 = 6))

6 x 12.5 x 25.5 / 2 / 1728 = .55

So:

2.31 + .55 = 2.86

Not what you guys got, but no matter how I do it, it's what I get.

ShaunMac

06-13-2003, 12:23 PM

In your post you listed 3 widths and NO depths?

Your box should have one width, not three.

If this drawing is correct. You have 1.75 cuft.

fantomas

06-13-2003, 12:28 PM

i took a second look....and my second attempt wasn't even close to the first.....i came out with... 1.82 cuft...ill try again later tonight and see what i get.....lol :banghead:

Trixter

06-13-2003, 12:29 PM

That is how I drew the box whan I figured it. I also got 1.75, but I checked it and I was wrong. look at my #'s above...

Terminator

06-13-2003, 12:37 PM

okay sorry its 27" DEEP

ShaunMac

06-13-2003, 12:40 PM

Originally posted by Trixter

So let's do the rectangle first:

12.5 x 12.5 x 25.5 / 1728 = 2.31

A 12.5 x 12.5 x 25.5 rectangle doesn't fit into this box. The top is only 6.5" deep.

The rectangle should be 6.5 x 12.5 x 25.5, then add the triangle.

1.199(rectangle) + .55(triangle) = 1.74 cuft.

Trixter

06-13-2003, 12:44 PM

ahh yes...

so I was right the first time. I took the bottom # instead of the top.

Terminator

06-13-2003, 01:47 PM

okay thanks guys