How many bricks each measuring 18 cm x12 cm x10 cm will be required to build a wall

How many bricks each measuring 18 cm x12 cm x10 cm will be required to build a wall 12 m long, 6 dm wide and 4.5 m heigh when 1/10 of its volume is occupied by mortar? Find also the cost of bricks at ₹ 225 per 100 bricks.

Given, dimensions of wall
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