The picture below is made up of 2 similar squares and 2 similar quadrants. The area of one square is 64cm$^2$. (a) Find the area of the shaded region. (b) Find the perimeter of the unshaded region. $(Take\pi = 3.14)$.

In the figure below, a square is cut into 3 parts X, Y and Z. The area of X $\frac{1}{3}$ of the whole square and the area of Y is $\frac{7}{4}$ of the area of Z. What is the ration of the area of X to the area of Y to the area of Z?

The figure below is made up of 4 identical quadrants and a square. Find (a) The perimeter of the figure. (b) The area of the figure. $(Take \pi = \frac{22}{7})$

A tank with a square base has a volume of 108cm$^3$. The length of one side of the base is $\frac{1}{4}$ that of its height. Find the area of its base.

Rectangle ABCD is divided into 6 identical small rectangle as shown below. Give that the perimeter of rectangle ABCD is 80cm, find the area of one small rectangle.