Question

Q.7 A wall 6m long, 5m high and 0.5m thick is to be constructed with bricks
each having length 25 cm , breadth 12.5 cm and height 7.5 cm.Find the number
of bricks required to construct the wall, if it is given that cement and sand
mixture occupy 1/ 20 of the volume of the wall.
I

Answer 1

There is,

lenth of wall=6m,hight=5m and thickness=o.5m

Hence,the volume of wall is

l×b×h

=6×5×0.5m³

=15m³

Again,the length of brick=25cm,breadth=12.5cm and the height=7.5cm

Hence,the volume of a brick,

l×b×h

=25×12.5×7.5m³

=2343.75m³

____(1)

We get from the equation no(1),

2343.75/1000000m³

=0.00234375m³

Therefore,used bricks for the construction of wall,bricks numbers,

15/0.00234375

=6400

Answer 2

Step-by-step explanation:

I hope it is helpfull for you.....