Question
How many bricks each measuring 25 cm x 11.25 cm x 6 cm , will be needed to build a wall 8 m x 6 m x 22.5 cm ?
Answer: Option C
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Number of bricks =` (Volume of the wall)/(Volume of 1 brick)`
= `((800 xx 600 xx 22.5)/(25 xx 11.25 xx 6))` = 6400.
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