The dimension of the wall areLength =8m=800cmBreadth =6m=600cmHeight =22.5cmWe know thatVolume of the wall=1×b×hBy substituting the values Volume of the wall =800×600×22.5By multiplicationVolume of the wall =10800000 cm3The dimension of the brick areLength =25 cmBreadth =11.25 cmHeight =5cmWe know thatVolume of one brick =1×b×hBy substituting the valuesVolume of one brick =25×11.25×6By multiplicationVolume of one brick =1687.5 cm3So the number of brick required =Volume  of  brickVolume  of  wall​By substituting the valuesNumber of brick required =1687.510800000​By divisionNumber of brick requited =6400Therefore, the number of bricks required to construct a wall is 6400.