The area of a circle is equal to 1 dm². Find the radius of the circle.

Question

Shasta

Mathematics

14 February, 12:29

The area of a circle is equal to 1 dm². Find the radius of the circle.

+5

Answers (2)

Know the Answer?

Marcos Cook · Answer 1

5.64 cm

Step-by-step explanation:

1 decimeter = 10 centimeters

1 dm^2 = 10^2 cm^2 = 100 cm^2

Area of circle = 3.14*r^2 = 100

r2 = 100/3.14*r^2 = 31.85

r = (31.85) ^1/2 = 5.64 cm

Janet Stuart · Answer 2

The radius of circle is 0.17 meters

Step-by-step explanation:

Since Area of circle is given as

Area of circle = pi * r²

So putting the values

0.1 m² = 3.14 * r²

0.1 / 3.14 = r²

0.031 = r²

Taking square root on both sides

r = 0.17 metres