Question

Bricks are worth Rs. 750 per 1000 pieces and their length, breadth and height are 25 cm, 125cm and 6 cm respectively, to build a wall 200 m long, 1.8 m high and 37.5 cm thick, is :
(A) Rs. 43200
(B) Rs.54000
(C) Rs.42600
(D) Rs.72000​

Answer 1

Answer

Given  dimension of the brick : length = 25 cm , breadth= 12.5 cm and height = 7.5 cm

Hence the volume of 1 brick = length × breadth × height .

⇒ Volume of the brick = 25×12.5×7.5=2343.75cm  

3

 

Given  dimension of the wall : length = 200 m , breadth= 37. 5 cm and height = 1.8 m

⇒ Volume of the whole wall =(200×100)×(1.8×100)×37.5=135,000,000cm  

3

 

⇒ No of bricks required = volume of the whole wall÷volume of a brick.

⇒  

2343.75

135,000,000

​  

 

⇒=57600 bricks

Now given the cost  of 1000 bricks is Rs 750 .

So cost of 57600 bricks will be :

⇒  

1000

57600×750

​  

 

→ Rs 43,200

The cost required to build the wall is Rs 43,200