Question

How many bricks of size 25cm x 15cm x 6cm are required to make a wall 5 metre long 2 metre height and 50 cm if 10% place is occupied by cement

Answer 1

Answer:

Volume of brick = 25×15×6=2250 cm

3

Volume of wall = 5×200×50=50000 cm

3

10 % of volume of wall is occupied by cement, therefore, volume of wall left for bricks is :

=50000−

100

10

×50000=50000−5000=45000 cm

3

Hence,

Number of bricks required =

2250

45000

=20