Given - Dimensions of brick - 30cm ×10cm ×7 1/2 cm Dimensions of wall - 30cm long 2m high and 3/4m thick Find - Number of bricks Solution - The volume of both brick and wall will be calculated by the formula Length*breadth*height. Volume of one brick = 30*10*15/2 Volume of one brick = 30*10*7.5 Volume of one brick = 2250 cm³ Now calculating volume of wall. Firstly converting height and thickness into centimetres. Height = 2 metres Height = 200 centimetres. Thickness = 3/4 metres Thickness = 75 centimetres Volume of wall = 30*75*200 Volume of wall = 4,50,000 cm³ Number of bricks required = 450000/2250 Number of bricks required = 200 Thus, 200 bricks will be required for given wall.
