If x is the area, y is the circumference and z is the diameter

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If x is the area, y is the circumference and z is the diameter of
circle then the value of x/yz is

Diameter of circle = z = 2r

⇒ r =	z	units
	2

Circumference = 2πr = 2π ×	z	units
	2

⇒ y = πz units
Area = πr²

⇒ x = π		z		²
		2

⇒ x =	πz²	sq.cm.
	4