A wall 24m long ,5 m high and 0.25m thick is to be constructed using bricks measuring 25cm×12.5cm×7.5cm. Find the no. of bricks required,if 5% of the wall is occupied by cement and sand mixture.
Volume of the wall = 2400*500*25= 30000000 cm³ Volume of brick= 25*12.5*7.5=2343.75 Volume to be covered by sand & cement is 5% Hence volume covered by brick =(100-5)%=95% Volume of wall to be covered by brick= 30000000*95/100= 28500000 No. of brick required=28500000/2343.75= 12160 No. of brick used are 12160
