More Maths - Multiple Square Metre Measurements

More
8 years 5 months ago #36793 by Toast
I asked ages ago how to get the square metre amount for patches on horse rugs & that's fine. I can do that easily.

However, I do lots of patches on one rug & have two different ways of finding out the total & get two different answers!

I have the following patch measurements in centimetres. Should I add all the lengths together then all the widths together & multiply the answers, or should I do a L x W sum for each & add the answers together?

29.5 x 12, 17 x 14, 39.5 x 13, 28 x 22.5, 24 x 20.

I got 1.1247m one way & 0.1753m the other way.

Help! Thanks.

[SIGPIC][/SIGPIC]Toast is the best food in the world
Whisky is the best drink in the world

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #478830 by Organix
Multiply all the patches seperately and then add the individual areas together. For those five rectangles the total area is 0.22155 m2

Harm Less Solutions.co.nz
NZ & AU distributor of Eco Wood Treatment stains and Bambu Dru bamboo fabrics and clothing

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #478831 by Megan
"a L x W sum for each & add the answers together?" - this!
I get 0.22155 sq metres.

Megan

The nice part about living in a small town is that when you don't know what you are doing, someone else does.
[SIGPIC][/SIGPIC]

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #478835 by Toast
Great, thanks. Got the same answer too, now.

I won't even ask why there's a different answer for each method!

Thanks again.

[SIGPIC][/SIGPIC]Toast is the best food in the world
Whisky is the best drink in the world

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #478871 by Stikkibeek
I can't for the life of me see why you are multiplying in metres.

29.5 x 12

???
29 metres of material is enough to build several completely new covers! You should convert all measurements to mm to work out the quantity of material you need. It is then a simple matter of shifting the decimal point to change the end result to metres in length if that is the only way you can buy patch material, otherwise leave it in mm or if you must, cm.

Did you know, that what you thought I said, was not what I meant :S

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #478878 by Hawkspur
Here is a quick diagram that shows why the order matters in maths.

Attached files Order.pdf (6.1 KB) 

Please Log in or Create an account to join the conversation.

More
8 years 5 months ago #478880 by EV

Stikkibeek;482343 wrote: I can't for the life of me see why you are multiplying in metres. ???
29 metres of material is enough to build several completely new covers!

She said her measurements were in cm., Stikkibeek.

Please Log in or Create an account to join the conversation.

More
8 years 4 months ago #482377 by Toast
12 x 6 = 18? I don't think so, but then I'm the one who had to ask the question in the first place!

[SIGPIC][/SIGPIC]Toast is the best food in the world
Whisky is the best drink in the world

Please Log in or Create an account to join the conversation.

More
8 years 4 months ago #482378 by John M
Another thing to be aware of is wastage. Best bet is to (either electronically in a spreadsheet, or manually with graph paper) mark out the width, and each piece needed all to accurate scale across the width of the product you're purchasing and then get the total length required in a meter format.

Regardless of material or cost process, it still matters from afinancial cost perspective.

John

Breeding black Wiltshire shedding sheep.

Full shedding, easy care, good feet, easy lambing and good mothering is what it takes to make the breeding cut!

Please Log in or Create an account to join the conversation.

More
8 years 4 months ago #482385 by Toast
This is not about purchasing. This is about charging the customer for the amounts used.

The purchasing side of it is well taken care of. I am not buying the canvas for each job. I have a very good supply on hand the whole time.

Thanks very much.

[SIGPIC][/SIGPIC]Toast is the best food in the world
Whisky is the best drink in the world

Please Log in or Create an account to join the conversation.

Time to create page: 0.205 seconds