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Calculate the number of bricks, each measuring 25 cm x 15 cm x 8 cm required to construct a wall of dimensions 10 m x 4 cm x 6 m when 10% of its volume is occupied by mortar ?

Correct Answer: 720

Explanation:

Let the number of bricks be 'N'


10 x 4/100 x 6 x 90/100 = 25/100 x 15/100 x 8/100 x N


10 x 4 x 6 x 90 = 15 x 2 x N => N = 720.


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