Question

how many bricks each measuring 25cm x 11.5 cm x 6cm will be needed to construct a wall8m long 6m high and 23 cm thick

Answer 1

Wall;
l=8m=800cm
h=6m=600cm
b=22.5cm
volume of the wall=lbh
                                =800*600*22.5
                                =10800000centi metre cube
brick;
l=25cm
b=11.25cm
h=6cm
volume=lbh
             =25*11.25*6
             =1687.5 centi metre cube
therefore number of bricks=volume of wall/volume of 1 brick
                                              = 10800000/1687.5
                                              =6400 bricks
therefore number of bricks is 6400 bricks

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