How many bricks will be required to construct a wall 10m long , 6m high and 22.5 cm thick, if each brick measure 25cm by 12cm by 9cm.

Volume of the wall = $(1000\times 600\times 22.5)cm^{3}$

Volume of one brick = $(25\times 12\times 9)cm^{3}$

$Number \, \, of \, \, bricks \, \, required =\frac{ Volume \, \, of\, \, wall}{Volume\, \, of\, \, 1\, \, brick}=$$\frac{1000\times600\times22.5}{25\times12\times9}=5000$

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