Question

Find the number of bricks each of dimensions 25 cm x 12.5 cm x 7.5 cm to make a wall of dimensions 5 mx 3 mx 20 m.
(A) 1200
(B) 1350
(C) 128000
(D)1400 ​

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.

Answer 2

Answer:

• Find the number of bricks, each measuring 25 cm, 12.5 cm and 7.5 cm required to construct a wall 6 m long , 5 m high and 50 cm thick, while the cement and sand mixture occupies 120th of the volume of the wall. So, 6080 bricks will be required to make a wall. Madhya Pradesh board exams 2021 examination pattern changed.

Step-by-step explanation:

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