Answers

2014-04-30T11:36:49+05:30
The area of brick = 24×12×8 cm³
Area of wall = 2400×800×6000cm³

Area of wall occupied by bricks =90% of 2400×800×6000
                                              =2400×800×600×9

No.of bricks = Area of wall occupied by bricks ÷ Area of bricks
                  = (2400×800×600×9) ÷ (24×12×8)
                  =4000000 bricks

2 4 2
Sorry Pepper,
i made a mistake in calculation the answer is 450000
its ok
2014-04-30T17:22:25+05:30
Volume of the wall = (2400 x 800 x 60)  
Volume of bricks   = 90%
of the volume of the wall  =[(90/100)*2400 *800 * 60]
Volume of 1 brick = (24 x 12 x 8)  
Number of bricks=(90/100)*(2400*800*60)/(24*12*8)=45000
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