How many kgs of sand are there in 110 litres?
Depends a bit on the granulometry characteristics and whether the sand is wet or dry. A good rule of thumb is 1.8 kg per litre (1.8 tonne per cubic meter), but that is just an estimate and real weight may differ. The thinking is this: quartz has a density of 2.65 kg per litre (2.65 g per cubic cm). But sand has a porosity on the order of 30% (varies somewhat depending on granulometry and roundness of the grains and how much the sand has settled together), so you have only 70 % of the volume as solid. 0.7 * 2.65 is about 1.85. If there is water in the pore space instead of air, of course you have to increase the weight a bit. So, as a ballpark figure, 1.8 to 2.0 is a good range for estimating. And a liter is 1000 cubic centimeters so one can use litre as a volume measure for a granular solid like sand.
