Question 1124869
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The volume of the tank is  3*2*1 = 6 cubic meters.


The volume of the non-filled part is 1/4 of it, i.e.  6/4 = 1.5 cubic meters.


The volume of one brick is  {{{(1/5)*(1/8)*(1/10)}}} = {{{1/400}}} cubic meters.


The answer is  {{{1.5/((1/400))}}} = 600 bricks.
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