Question

Find the number of bricks each measuring 25cm *12.5 cm *7.5cm required to construct a wall 12 m long 5 m high and 0.25 m thick wall the sand and the cement mixture occupies 5% of the total volume of the wall

Answer 1

volume of wall=500×600×5=15000000 volume of mixture=15000000×1/20=750000 left wall volume =15000000_750000=14250000 required brick=14250000/25×12.5×7

5=6080

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Answer 2

refer to the image I did by computer and is correct