Question

the size of a brick is 25cm x 12cm×10cm, the no. of bricks required to construct a wall 5m long, 2m high, having a width of 60cm is:-
a.) 2000
b.)200
c.) 50
d.) 500

please show calculation also. ​

Answer 1

Answer:

20000 Bricks of dimension 25cm x 12cm×10cm  are required to build the wall .

Volume of The Wall

Length (l) of the wall = 5m.

Height (h) of the wall  = 2m.

Breadth (b) of the wall = 60cm = 0.6m.

Volume of the wall = Length(l) ×Breadth (b)×Height (h)

Volume of the wall = 5 × 2 × 0.6 = 10 × 0.6

Volume of the wall = 10 × 0.6

Volume of the wall = 6m³.

Volume of Brick

Length(l) of the brick = 25 cm = 25/1000 = 0.025m.

Height (h) of the brick = 12cm = 12/1000 = 0.012m.

Breadth (b) of the brick = 10cm = 10/1000 = 0.01 m .

Volume of the brick =  Length(l) ×Breadth (b)×Height (h)

Volume of the brick = 0.025 × 0.012 × 0.01

Volume of the brick = 0.000003 m³.

$\sf \red\bigstar Number \:of \:bricks \: required = \dfrac{Volume \: of \:the \: wall }{Volume \:of \:one \: brick}$

$\sf Number \: of \: bricks \: required = \dfrac{6}{0.000003}$

$\sf Number \: of \: bricks \: required = \dfrac{6*100000}{0.000003*100000}$

$\sf Number \:of \:bricks\: required = \dfrac{600000}{3}$

Number of Bricks required = 200000.