in cement morter the void between sand and cement is less
and take 25% total wet volume of water.take 10 cu m wet
volume of morter increse 25% than total volume of dry
material 12.5 cu m . if we find the material in 1:6 morter
than 12.5/(1+6)
cement=1.78 cu m sand=1.78*6=10.71cu m

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