Question

What is the radius of a circle with an area of 78.5 square inches? Use 3.14 for pi. Enter your answer in the box.

Answer 1

Answer:

area of circle = pie r²

78.5 = 3.14 r²

78.5/3.13 = r²

5 = ŕ²

r = 5 inch

Answer 2

The radius of circle is 5

Step-by-step explanation:

Let the radius of circle be r

Area of circle =$\pi r^2$

Area of circle =$3.14 \times r^2$

We are given that  an area of 78.5 square inches

So, $3.14 \times r^2 =78.5$

$r^2 = \frac{78.5}{3.14}$

$r^2 =25$

$r=\sqrt{25}$

r=5

Hence The radius of circle is 5

#Learn more:

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