Question

5.
d
A = Area of sector
2
= 140 mm
d of the circle
= 30 mm
a=​

Answer 1

Answer:

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Step-by-step explanation:

Arc length of the Circle : Area of the Sector = Perimeter of the Circle :Area of the Circle

Let the radius of the circle be 'r'.

Hence, 20:60=2πr:πr

2

1:3=2:r

r=6 (Product of Means = Product of Extremes)

Therefore, Diameter=2r=12cm