Figure 1 shows a square tile made up of 2 grey squares, B and C and 2 identical white rectangles D. The length of 1 side of square B is twice the length of 1 side of square C.
- What fraction of the square tile in Figure 1 is white?
- Figure 2 shows a wall laid with square tiles. The wall is 6 m by 6 m and is completed covered with square tiles. Find the total area of the wall covered by grey squares.