21. Gill is now 27 and has moved in to a new flat. She has four pictures to hang in a horizontal row on a wall which is 4800 mm wide.
The pictures are identical in size and are 420 mm wide. Gill hangs the first two pictures so that one is on the extreme left of the wall and one is on the extreme right of the wall.
She wants to hang the remaining two pictures so that all four pictures are equally spaced.
How far should Gill place the centre of each of the two remaining pictures from a vertical line down the centre of the wall?
23. The diagram shows four shaded glass squares, with areas of 1 cm² , 4 cm² , 9 cm² and 16 cm² , placed in the corners of a rectangle.
The largest square overlaps two others. The area of the region inside the rectangle but not covered by any square (shown unshaded) is 1.5cm² .
What is the area of the region where the squares overlap (shown dark grey)?
Back to the top