Question

How many bricks are needed to build a wall 128cm long 32cm broad and 4cm high if each brick is 8cm×4cm×2cm

Answer 1

Solutions :-

Given :
Dimension of wall = 128 cm × 32 cm × 4 cm
Dimension of brick = 8 cm × 4 cm × 2 cm

Find the number of bricks needed to build a wall :-

$Number \: \: of \: \: bricks = \frac{volume \: \: of \: \: wall}{volume \: \: of \: \:each \: \: brick} \\ \\ = \frac{128 × 32 × 4 }{8 \times 4 \times 2} =256$

Hence,
Number of bricks are needed to build a wall = 256

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✯ @shivamsinghamrajput ✯

Answer 2

Solutions :

We have,
A wall is 128cm long, 32cm broad and 4cm high.
Each brick is 8cm × 4cm × 2cm.

Number of bricks = (volume of wall)/(volume of each brick)
= ( 128 × 32 × 4)/(8 × 4 × 2)
= 256

Answer : Number of bricks required to build a wall = 256