30632

Warmsnug double glazing
1. We worked out the perimeter and area of each shape.
2. Then we found which windows had the same area and worked out the difference between E and O. We realised the difference in price was because E had 2cm more frame than O.
3. We found the price difference to be £110. We then halved this because there were 2cm of frame. They were then £55 each.
4. We realised this could not be correct as this would make the cost of all the other frames too much.
5. We used I and K to work out 1cm of frame was £20 and used J to work out that 1cm² of glass was £10 by taking away the price of the frame and divided the leftover number by 12 as there was 12cm² of glass.We already knew that E or O had to be wrong because of the mix up when we thought 1cm of frame to be £55.
6. We added the frame to the glass for each window, and found E to be wrong.