Question

how many bricks of each 20 cm long 10 cm wide and 6.0 cm thick will be required for a wall 15m long 3m height and 1.5 m thick

Answer 1

volume of wall = l×b×h

= 15×3×1.5

: = 67.5m^3

now , length of brick = 20cm= 0.2m

breadth of brick= 10 cm = 0.1m

height of brick= 6cm = 0.06 m

so volume = 0.2×0.1×0.06

= 0.0012m^3

so , no.of brick = volume of wall/ volume of brick

= 67.5/0.012

56250 bricks