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21-05-2020
Mathematics

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the area of a circle is 78.5 cm2. Find the length of the radius of the circle . Use pi = 3.14

the area of a circle is 785 cm2 Find the length of the radius of the circle Use pi 314 class=

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22-05-2020

Answer:

r= 5

Step-by-step explanation:

area = [tex]\pi r^{2}[/tex]

78.5 = 3.14[tex]r^{2}[/tex]

r = [tex]\sqrt{ \frac{78.5}{3.14}}[/tex]=5

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