Question

who is genius do fast if u are helper fast u can

Answer 1

Volume of the wall = (2400 x 800 x 60)  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

volume of brick = 24×12×8=2,304 cube cm

volume of wall made of brick=90% of 24×8×60
=24×8×6×9 cube m
=24×8×6×9×1000000 cube cm

number of bricks =24×8×6×9×100000 ÷ 24×12×8
=45000 bricks

option D