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The area of a circle is 78.5 cm2. What is the diameter of the circle?

The area of a circle is 78.5 cm2. What is the diameter of the circle?
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1 vote
The area of a circle is 78.5 cm2. What is the diameter of the circle?

User YAMAMOTO Yuji
by
8.5k points

2 Answers

1 vote
Your answer is 157, i'm pretty sure


User Sheldon Wei
by
8.0k points
4 votes
hello :
The area of a circle is : A = π × r²
r² = A/π
r² = 78.5/3.14
r² = 25
r = 5
but : d = 2r ... r : ridus and d : the diameter
so : d= 10
User Gfytd
by
7.7k points
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