Question

Construct a wall 25 m long 0.3 m thick and 6 m high brick of dimension 50cm×15cm×10cm each are used if the motor occupies 1/10 of the volume of the wall find the number of brick used brick

Answer 1

Given-
wall's diamention= 25x0.3x6m
brick's diamention=50x15x10cm

Formula- volume of cuboid=LBH

To Find-No. of bricks ?

Solution-
vol. of wall =2500x30x600<convert into centimeter>4,50,00,000
vol. of brick = 50x15x10 = 7500
1/10 volume=45,00,000
remaining vol. =4,50,00,000-45,00,000=4,05,00,000
no.of bricks=4,05,00,000/7500=5400

Therefore there are 5400 bricks.

Answer 2

volume of the wall =l×b×h
given,
l=25m=25×100=2500cm
b=0.3m=0.3×100=30cm
h=6m=6×100=600cm

volume of the wall =(2500×30×600)cm3.

volume of the wall=no of bricks ×(volume of each brick).
therefore no of bricks =volume of wall÷volume of one brick.
=2500×30×600÷50×15×15
=6000bricks.

space occupied by mortar =6000-1/10×6000
=6000-600
=5400bricks.