9th Class
Mathematics
Surface Areas and Volumes
Question Bank
Surface Areas and Volumes
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