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13. Find the number of bricks, each measuringcm x 12.5 cm x 7.5 cm required toconstruct a wall 6m long 5 m heigh and o.5m thick, while mortar occupies 5% of thevolume of the wall |
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Answer» Bricks Wall l=25 cm l=6 m =600 cm b=12.5 cm b=50 cm h=7.5 cm h=5 m =500 cm volume of wall=l x b x h =600 x 50 x 500 =15000000 cubic cm volume of mixture =1/20 x 15000000 =750000 cubic cm volume left =15000000 - 750000 =14250000 cubic cm required brick =14250000/25 x 12.5 x 7.5 =6080 bricks |
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