Question

find the number of bricks each measuring 25 cm into 12.5 cm into 7.5 CM required to construct what 12 metre long 5 metre high n 0.25 think while the sand and cement mixture occupies 5 % of the total volume of the wall​

Answer 1

ANSWER

Given wall dimensions as: 6 m long, 5 m high and 0.5 m thick.

⟹ volume of wall =6×5×0.5=15m

3

Given, cement and sand mixture occupies

20

1

of the volume of the wall.

Therefore, volume of the wall occupied by the bricks =(1−

20

1

) volume of wall =

20

19

volume of the wall

=

20

19

×15=14.25m

3

Now, volume of each brick =

100

25

m×

1000

125

m×

1000

75

m

So, the number of bricks required =

volume of each brick

volume of wall

=

100

25

m×

1000

125

m×

1000

75

m

14.25m

3

=6080

Hence, 6080 bricks of given dimensions are required to construct the wall.