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The number of bricks, each measuring ...

The number of bricks, each measuring `25 c mxx12. 5 c mxx7. 5 c m` , required to construct a wall 6 m long, 5 m high and 0.5 m thick, while the mortar occupies 5% of the volume of the wall, is (a) 3040 (b) 5740 (c) 6080 (d) 8120

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