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Find Circumference of a circle if the area is 400π m2?

Updated: 10/26/2022

Wiki User

∙ 14y ago

Best Answer

pi*r2 = 400*pi

Therefore radius = 20 meters

Cicumference = 2*pi* radius = 40*pi meters

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∙ 14y ago

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If a circle has an area of 400 cm find the radius to the nearest tenth?

r = sqrt(400/pi) = 11.3 cm

If a circle has area of 400 square units then what is the radius?

If a circle has area of 400 square units then its radius is: 11.25 units.

What is the circumference of a circle with an arc of 90 and an angle of 81?

90*360/81 = 400 units of length.

What is the area of a circle with a radius of 20?

400 pi

Find the area of a circle with the diameter of 40m?

The area of a circle is (pi) times (the radius)2. The radius of the given circle is 1/2 of the diameter = 20m. Area = (pi) times (20)2 = 400(pi) = 1,256.64 square meters(rounded)

Related questions

Find the radius of a circle of with area of 400?

11.3

Find the circumference of a circle if the area is 400 Pi meters?

First we have to find the radius: pi*radius2 = 400*pi square meters Divide both sides by pi and then square root both sides: radius = 20 meters 2*pi*radius or pi*diameter = circumference 2*pi*20 = 40*pi meters

If the radius of a circle is doubled what happens to the area of the circle?

the area of the circle is increased by 400%

If a circle has an area of 400 cm find the radius to the nearest tenth?

r = sqrt(400/pi) = 11.3 cm

If a circle has area of 400 square units then what is the radius?

If a circle has area of 400 square units then its radius is: 11.25 units.

What is the circumference of a circle with an arc of 90 and an angle of 81?

90*360/81 = 400 units of length.

What is the area of a circle with the radius of 20 inches?

Using 3.14 as Pi the area of circle is: 1256.0

What is the area of a circle with a radius of 20?

400 pi

Find the area of a circle with the diameter of 40m?

The area of a circle is (pi) times (the radius)2. The radius of the given circle is 1/2 of the diameter = 20m. Area = (pi) times (20)2 = 400(pi) = 1,256.64 square meters(rounded)

If a circle has the diameter of 40 in what is the area?

Area of circle: pi*20^2 = 400*pi square units

What is the area of a circle with a diameter of 400 miles?

A ≈ 126,000 square miles.

What is the area of a circle whose radius is 20 meters?

Using 3.14 as Pi the area of circle is: 1256.0

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