Answer / karthik rajendren

Volume of 1 block without mortor =
0.45*0.225*0.225=0.0228m3/Nos
Volume of 1 block with 10mm thk mortor =
0.47*0.245*0.225=0.0259m3/Nos
So,Vol/Nos =0.0228-.0259=0.0031 m3/No.
For 1 Sqm = .0031*12.5=0.0388 m3/m2

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