Question

How many bricks will be required to construct a wall 10m long,6m high and 22.5cm thickness,if each brick measures 25cm×12cm×9cm.​

Answer 1

Hi!

wall;

l=8m=800cm

h=6m=600cm

b=22.5cm

volume of the wall=lbh

                               =800*600*22.5

                               =10800000centi metre cube

brick;

l=25cm

b=11.25cm

h=6cm

volume=lbh

            =25*11.25*6

            =1687.5 centi metre cube

therefore number of bricks=volume of wall/volume of 1 brick

                                             = 10800000/1687.5

                                             =6400 bricks

therefore number of bricks is 6400 bricks

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Answer 2

Answer:

vol of cuboid

lbh

$25 \times 12 \times 9$

$= 2700cu.units$

$2700 + thickness = 2720.5$