question_answer

How many bricks, each measuring \[25\,cm\times 11.25\text{ }cm\times 6\text{ }cm,\] will be needed to build a wall \[8\,m\,\times 6\,m\,\times 22.5\,cm?\]

A)  5600                           

B)  6000   

C)         6400               

D)         7200

Correct Answer: C

Solution :

Length of wall = 8m = 800 cm Breadth of wall = 6m = 600 cm Height of wall = 22.5 cm Volume of wall Also, volume of each brick Let ?n? be number of bricks required to build the wall.  Volume of wall volume of each brick