Check my maths please

[Bonzo]

Would any of you maths boffins out there be kind enough to double check my calculations for me

Not my strongest of subjects at school .... Too busy winding up the teachers & showing off to girls

The section of sump I recently removed was approximately: 240mm long X 175mm wide 18mm deep.

I worked this out to 75600 mm2

This in turn coverts into .756 litres lost oil capacity ( 3/4 L ) Right !!??

Personally would have guessed about 1/2 litre .... Perhaps i'll have to provide some extra capacity after all

[Big Vern]

Hi Ronnie,

Basically yes! 1000cm3 = 1 litre
so 24cm X 17.5cm X 1.8cm = 756cm3
therefore 756cm3 = 0.756 litre

Cheers BV.

[Tatey]

I concur, although you missed a 0 from your volume and shouldnt it be mm^3 not mm^2

Did the bit you cut off come off in one bit without putting any holes in it? If for a little test, could you not just fill it up with water from a litre bottle and see how much you have left?

[Bonzo]

Thanks BV

Not quite as stupid as I thought .... Mind you I did not have a clue as to how to convert square mm into Litres though, had to use an online converter for that

[Bonzo]

Originally Posted by Tatey

I concur, although you missed a 0 from your volume and shouldnt it be mm^3 not mm^2

Did the bit you cut off come off in one bit without putting any holes in it? If for a little test, could you not just fill it up with water from a litre bottle and see how much you have left?

Well I did say, me pay no attention at school

Filling the piece I cut out would be difficult .... Just a flat strip of alloy now

Thanks Tatey

[alga]

My tip is to convert the input units to whatever you would like to get. A litre is a cubic decimetre, so you will get the result in litres if you convert the inputs to decimetres:

2.4 * 1.75 * 0.18 = 0.756

This way you don't have to think about how many cubic millimetres there are in 1 litre.

Similarly, if I know a cubic metre of steel weighs 7800 kg, and want to calculate how much a metre length of 25x25x1.5 tube weighs, I convert the lengths to metres:

(0.025^2 - (0.025 - 2 * 0.0015)^2) * 1 * 7800 = 1.0998

[Bonzo]

Originally Posted by alga

My tip is to convert the input units to whatever you would like to get. A litre is a cubic decimetre, so you will get the result in litres if you convert the inputs to decimetres:

2.4 * 1.75 * 0.18 = 0.756

This way you don't have to think about how many cubic millimetres there are in 1 litre.

Similarly, if I know a cubic metre of steel weighs 7800 kg, and want to calculate how much a metre length of 25x25x1.5 tube weighs, I convert the lengths to metres:

(0.025^2 - (0.025 - 2 * 0.0015)^2) * 1 * 7800 = 1.0998

I knew that !! Not

Sounds easy when it is put like that