Question

A block measure 22cm by 11cm by 7cm. How many of these blocks will be needed to build a wall 5 1/2m long, 22cm thick and 3 1/2m high.​

Answer 1

The number of blocks that will be needed to build the wall is 2500

Explanation:

The number of blocks that will be needed to build the wall is;

`n = (volume of wall)/(volume of block) \\volume = l *b*h\\`

given the dimensions of the block and wall as;

block = 22cm by 11cm by 7cm

wall = 5 1/2m long, 22cm thick and 3 1/2m high. = 550cm by 22cm by 350cm

substituting into the equation, we have;

`n = (volume of wall)/(volume of block) \\volume = l *b*h\\\\n = (550*22*350)/(22*11*7) \\n = 2500`

The number of blocks that will be needed to build the wall is 2500