How many bricks each of size `25 c m\ xx\ 10 c m\ xx\ 8c m` will be required to build a wall 5m long, 3m high and 16cm thick, assuming that the volume of sand and cement used in the construction is negligible?

Explanation

`1 m = 100 cm`
Length of brick =` 25 cm`
`0.25 m`
Breadth of brick = `10 cm`
` 0.1 m`
Height of brick =` 8 cm `
` 0.08 m`
Volume of brick=`lxxbxxh`
`0.25xx0.1xx0.08`
`0.002m^3`
Length of wall =` 5 m`
Breadth of wall = `3m`
Height of wall = `16 cm`
` 0.16 m`
Volume of wall =`lxxbxxh`
`5xx3xx0.16`
`2.4m^3`
Number of bricks required
`(2.4)/(0.002)`
`12`
Hence `1200 bricks` are required to build a wall.