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Concrete is normally estimated in cubic metres
Convert all figures to metres and multiply
3 x 3 x 0.125 = 1.125 cubic metres
Plus 10% for shrinkage = 1.24 cubic metres
10 bags cement
0.7 cubic metres sand
0.86 cubic metres of stone
All assuming you want a strong mix
Square metres is a measure of area. Cubic metres and cubic yards is a measure of volume. There is no conversion between them without a third dimension.
Consider a storeroom that's 40.3 square metres in area. How much stuff can you store in it? Well, that depends on how high the ceiling is. If the ceiling is 2 metres high then the volume of the room is 80.6 cubic metres. If the ceiling is 3 metres high then the volume is 120.9 cubic metres.
Cubic metre is a measure of volume. Tonne is a measure of weight (or mass). The weight of 5 cubic metres of something depends on the density of that something.
5 cubic metres of air weighs a fraction of a tonne. 5 cubic metres of water weighs 5 tonnes. 5 cubic metres of lead weighs about 56 tonnes.
the formulae for the surface area of round disc is pi * r * r where pi=3.14 and r =radious of disc= diametre/2
for this 1st u have 2 calculate the radious of the disc that is 180/2=90mm then convert it to m by dividing 1000 ,so radious=90/1000=0.09 m finally calculate the area= 3.14 * 0.09 * 0.09=0.025434 sq metres for 38 disc multiply 38 with the above area that is 0.025434 * 38=0.966492 sq metres
in excel 2007 u can do it more easily by going 2 formulas tab. Under formla tab click on engineering formula and then convert here u can convert from mm to m after converting use the above formula i just told u.
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