a wall 6m long, 50cm wide and 5m high is made of bricks, each measuring (25cm x 12.5cm x 7.5cm). If 1/20 of the total volume of the wall consists of cement and sand mixture, how many bricks are there in the wall
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Answer:
6080 bricks
Step-by-step explanation:
volume of wall = length × breadth × height
= 6 m × 50 cm × 5 m = 600 cm × 50 cm × 500 cm = 15000000 cm^3
volume of cement and sand mixture in wall,
= 15000000 × (1/20) cm^3
= 750000 cm^3.
volume of bricks in wall
= volume of wall - volume of cement and sand mixture in wall
= 15000000 - 750000 = 14250000 cm^3
volume of each brick = 25 cm × 12.5 cm × 7.5 cm
= 2343.75 cm^3
total number of bricks in wall
= (volume of bricks in wall / volume of each brick)
= 14250000 cm^3 / 2343.75 cm^3
= 6080.
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