Question

a wall is 8m long , 4m high , and 22.5 cm thick. how many bricks of length 25 cm , breadth 12.5 cm, and 8 cm high are needed to build the wall?

Answer 1

Answer:

The number bricks needed to build the wall = 2880

Step-by-step explanation:

Dimensions of the wall:

Length (L) = 8m = 800 cm,

Breadth (B)=4m = 400 cm,

Thickness(W)= 22.5 cm,

Dimensions of each brick:

Length (l) = 25 cm,

Breadth (b) = 12.5 cm,

Thickness (w) = 8 cm

Let the number bricks needed to build the wall = n

$n = \frac{Volume \:of \:the \:wall }{volume \: of \:one \:brick }$

$= \frac{LBW}{lbw}\\=\frac{800\times 400\times 22.5}{25\times 12.5\times 8}\\=2880$

Therefore,

The number bricks needed to build the wall = n = 2880

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Answer 2

Answer:

2880 is the correct answer

Step-by-step explanation:

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