Question

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hay=
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A wall 15m long,30cm wide and 4m high is made of bricks,each measuring (22cm×12.5cm×7.5cm).
if 1/12 of total valume of the wall
consist if mortar,how many bricks are there in the wall ?

PLEASE GIVE ME OWN ANSWER

Answer 1

hay=
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wall= L =1500cm, B = 30cm,h= 400cm,

brick = L= 22cm, B= 12.5cm, H=7.5cm

volume of wall = L×B×H

1500×30×400
= 18000000cm³

volume of 1 brick = L×B×H

22×12.5×7.5
2062.5cm³

volume of wall consists of mortar
= 1/12× volume of wall

1/12×18000000 = 1500000cm³

bricks of volume = 18000000-1500000
= 16500000cm³

number of bricks = bricks volume / volume of one brick

= 16500000cm³/2062.5cm³

= 8000

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i hope is help you

Answer 2

Given ,

l = 1500cm 
b= 30cm 
h= 4m= 400cm


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➡ total volume of the wall
= l×b×h 
= 1500×30×400
= 1,80,00,000 cm^3 




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⭕ Volume of wall containing only bricks
= total volume of the wall - volume of wall containing mortar 


= 1,80,00,000 - (1,80,00,000 * 1/12) 
= 1,65,00,000 cm^3 




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no. of bricks
= volume of wall containing bricks / volume of one brick 

= 1,65,00,000 / 2062.5 

= 8000 bricks.