Question

A brick measures 20 cm x 10 cm x 75 cm. How
many bricks will be required for a wall
20 mx 2 mx 0.75 m?​

Answer 1

Answer:

given :-

• dimensions of the brick is = 20cm × 10cm × 7.5cm (15/2)

•  dimensions of the wall is = 25m × 2m × 0.75m (3/4m)

in cms :-

25m = 25 × 100 = 2500cm, 2m = 2 × 100 = 200cm and 0.75m = 0.75 × 100 = 75cm.

volume of the brick = l × b × h

= 20 × 10 × 7.5

= 1500cm³

volume of the wall = l × b × h

= 2500 × 200 × 75

= 37500000cm³

therefore no. if bricks required for the wall = (volume of wall)/(volume of the brick)

= 37500000/1500

= 25000 bricks

hence, 25000 bricks are required for the wall.

Answer 2

Step-by-step explanation:

${ \huge{ \purple{ \star{ \underline{ \boxed{ \mathfrak{Dimension \: \: of \: \: brick}}}}}}}$

${ \large{ \red{: \longrightarrow{ \boxed{ \sf{Height = 20cm}}}}}}$

${ \large{ \blue{: \longrightarrow{ \boxed{ \sf{Breadth = 10cm}}}}}}$

${ \large{ \orange{: \longrightarrow{ \boxed{ \sf{Length = 75cm}}}}}}$

${ \huge{ \pink{ \star{ \underline{ \boxed{ \mathfrak{Dimension \: \: of \: \: wall}}}}}}}$

${ \large{ \green{: \longrightarrow{ \boxed{ \sf{Length= 20m = 2000cm}}}}}}$

${ \large{ \red{: \longrightarrow{ \boxed{ \sf{Breadth = 2m = 200cm}}}}}}$

${ \large{ \purple{: \longrightarrow{ \boxed{ \sf{Height = 0.75m = 75cm}}}}}}$

${ \large{ \blue{ \underline{ \boxed{ \mathfrak{Number \: \: of \: \: bricks \: \: required = \frac{Volume \: \: of \: \: wall}{Volume \: \: of \: \:a \: \: brick} }}}}}}$

${ \pink{ \therefore{ \sf{Number \: \: of \: \: bricks = {\cancel{\frac{2000 \times 200 \times 75}{20 \times 10 \times 75 } = }}}}}} \: \: { \large{ \green{ \boxed{ \sf{2000 \: Bricks}}}}} \: \: { \large{ \red{ \sf{Ans.}}}}$