A mason constructs a wall of dimensions with the bricks each of size and it is assumed that space is covered by the mortar. Then, the number of bricks used to construct the wall is


Volume of cuboid = lbh


where, l = length, b = breadth and h = height


For wall,


Length, l = 270 cm


Breadth, b = 300 cm


Height, h = 350 cm


Volume of wall = 270 × (300) × (350) = 28350000 cm3


As of this volume is covered by mortar, therefore of this volume is covered by bricks.


Volume of wall covered by bricks = 7/8 (volume of wall)


= 7/8 (2835000)


= 24806250 cm3


For one brick,


Length, l = 22.5 cm


Breadth, b = 11.25 cm


Height, h = 8.75 cm


Volume of one brick = lbh


= 22.5(11.25)(8.75) cm3




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