I've given up waiting for the household female to do the undercoating so today I did a bit myself (in a fraction of the time I might add).
Also have organised 5 mates (yes, believe it or not I have a few) to come at 7pm tonight to help lift a granite workspace from the old kitchen. Given the bulk density of granite is around 2.7 tonnes per cubic metre I've calculated that the slab is around 150kg. I've also managed to find a buyer if we don’t break it.
For homework you can now calculate the area of the slab, given its thickness of 25mm.