Volume of irregular shape.

[TonyRPH]

I want to calculate the volume of an irregular shape (it's a speaker cabinet).

Can I be cheeky and ask (it's not too much trouble) for someone to calculate this for me please?

All dimensions are on the drawing below.

Thanks in advance.

[Mammasaid]

That's a 2D shape you've shown, to calculate volume you need 3 dimensions, length, width & height.

[designforlife]

i'll do it now, bear with me

[designforlife]

internal angles?

[timbo999]

Mammasaid said:

That's a 2D shape you've shown, to calculate volume you need 3 dimensions, length, width & height.

The height is given at the top of the page...

[designforlife]

I don't have all the info, but without knowing the internal angles i can give you 77161.42cm3 for starters

Knowing the overall height and width of the shape and/or the internal angles would be helpful to get it more accurate

[Mammasaid]

timbo999 said:

Mammasaid said:

That's a 2D shape you've shown, to calculate volume you need 3 dimensions, length, width & height.

The height is given at the top of the page...

I took the height (60cm) to be the distance from the base line (27.74cm) to the apex of the pentagon, you can then work out the area of this pentagon.

Edit: actually that's not possible as 35 + 20.5 < 60 .....

However without the internal angles of the pentagon, you can't work out the area.

Edited by Mammasaid on Thursday 6th June 15:13

[designforlife]

Mammasaid said:

timbo999 said:

Mammasaid said:

That's a 2D shape you've shown, to calculate volume you need 3 dimensions, length, width & height.

The height is given at the top of the page...

I took the height (60cm) to be the distance from the base line (27.74cm) to the apex of the pentagon, you can then work out the area of this pentagon.

nah, then the 20.5 and 35cm don't work. I took 60cm as the height of the shape when extruding the profile.

[designforlife]

As i find myself saying daily to Sales... More info please!

[Mammasaid]

designforlife said:

Mammasaid said:

timbo999 said:

Mammasaid said:

That's a 2D shape you've shown, to calculate volume you need 3 dimensions, length, width & height.

The height is given at the top of the page...

I took the height (60cm) to be the distance from the base line (27.74cm) to the apex of the pentagon, you can then work out the area of this pentagon.

nah, then the 20.5 and 35cm don't work. I took 60cm as the height of the shape when extruding the profile.

See above!!!

[designforlife]

Mammasaid said:

designforlife said:

Mammasaid said:

timbo999 said:

Mammasaid said:

That's a 2D shape you've shown, to calculate volume you need 3 dimensions, length, width & height.

The height is given at the top of the page...

I took the height (60cm) to be the distance from the base line (27.74cm) to the apex of the pentagon, you can then work out the area of this pentagon.

nah, then the 20.5 and 35cm don't work. I took 60cm as the height of the shape when extruding the profile.

See above!!!

incorrect

[designforlife]

73092.694cm3 is your answer.

I used the sketch in solidworks to work out the angles myself.

[InitialDave]

An accurate dimension bisecting the shape in some fashion should provide the necessary extra information. Just a measurement from any one corner to another.

[designforlife]

[designforlife]

Thank goodness for SW sketch picture function lol.

If you give me the material i can tell you a weight if you need it.

[louiebaby]

InitialDave said:

An accurate dimension bisecting the shape in some fashion should provide the necessary extra information. Just a measurement from any one corner to another.

Or just wrap it tightly in clingfilm, chuck it in a full bath, and measure the water displaced...?

[louiebaby]

designforlife said:

Thank goodness for SW sketch picture function lol.

If you give me the material i can tell you a weight if you need it.

That's cool, how do you know the 49 cm bit?

[TonyRPH]

Wow, thankyou @designforlife - I don't need the weight - these are already built out of what seems to be 25mm MDF and they are extremely heavy!!!!

Thanks to everyone else too.

Very much appreciated.



EDIT: Loving the 3d screenshots - I tried to draw this myself in 3d but had no clue where to start!

[Mammasaid]

louiebaby said:

That's cool, how do you know the 49 cm bit?

Yes, how?

[ATG]

He assumed the original diagram accurately depicted the shape.