Question

Calculate the number of bricks, each measuring 25 cm x 10 cm x 8 cm required to construct a wall of dimensions 10 m x 4 m x 5 m when 10% of its volume is occupied by concrete ?

Answer 1

Volume of the wall = (2500 x 1000 x 80)  cu.cm  

 

Volume of bricks   = 90% of the volume of the wall 

= [(90/100) x 2400 x 800 x 60] cu.cm  

 

Volume of 1 brick = (24 x 12 x 8)  cu.cm 

 

Number of bricks = [(90/100) x (2400 x 800 x 60) ]/ (24 x 12 x 8) = 45000

Answer 2

Bricks Volume needed=90% volume of wall=1000cm×400cm×500cm=200000000cubic cm
No of bricks=200000000÷volume of a brick
=200000000÷25×10×8=100000