16. The ratio of the areas of two squares one having double its diagonal than the other is:

17. The length of a plot is four times its breadth. A playground measuring 1200 square metres occupies a third of the total area of the plot. What is the lengthof the plot in metres?

18. The area of a rectangle 144 m long is the same as that of a square having a side 84 m long. The width of the rectangle is: