Question

Dimensions of the brave is 24 cm into 12 cm into 8 cm how many such bricks will be required to build a wall 20 cm length 40 cm breadth and 6 cm height

Answer 1

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