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Question

How many bricks will be required to construct a wall 8 m long,6m high and 22.5 cm thick if each brick measures 25m×11.25cm×6cm.?

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Solution

Wall;
l=8m=800cm
h=6m=600cm
b=22.5cm
volume of the wall=lbh
=800 x 600 x 22.5
=10800000 cm3
brick;
l=25cm
b=11.25cm
h=6cm
volume=lbh
=25 x 11.25 x 6
=1687.5 cm3
therefore the number of bricks =volume of wallvolume of 1 brick
= 108000001687.5
= 6400 bricks
Therefore, 6400 bricks will be required to construct a wall 8 m long,6m high and 22.5 cm thick.


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