the area of a circle is 61.6 CM square find the circumference
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Answer:

Secondary School
Math
5 points
Find (a) the diameter (b) the radius of each circle , given the circumference as{take 22/7} i)22cm ii)8.8m iii)61.6m
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by Zidan57 04.11.2018
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TharunKorivi
Ace
Circumference of the circle=2×piexr/pie×d
i)22cm
Diameter=Circumference of the circle/pie
=22÷22/7
=7cm
Radius=d/2=7/2=3.5cm
ii)8.8m
Diameter=Circumference of the circle/pie
8.8÷22/7
=2.8m
Radius=d/2=2.8/2=1.4m
iii)61.6m
Diameter=Circumference of the circle/pie
=61.6÷22/7
=19.6m
Radius=d/2=19.6/2
=9.8m
Answer:
27.807 cm is the perimeter of the circle.
Step-by-step explanation:
Area of the circle = 61.6 cm²
Area = πr²
Let the radius of the circle be n.
3.14 x n² =61.6
n²=61.6/3.14
n²=19.61
n=√19.61
n=4.428 cm.
Radius of circle = 4.428 cm.
Perimeter=2πr
=2 x 3.14 x 4.428
=6.28 x 4.428
=27.807 cm
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