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If the radius of a circle is increased by 20 percent then the area is increased by?
Wiki User
∙ 14y ago
Area = pi r2 A = pi(r+20%)2 ----->INCREASED AREA A = pi(r+0.2) 2 A = pi(r2+0.4r+0.04) = pir2 + 0.4pir+ 0.04pi But the Area of the circle is pir2, so subtract the original area from the increased area! pir2+0.4pir+ 0.04pi - pir2 0.4pir + 0.04pi-----------ANSWER % ORpi(0.4r+0.04) pi = 3.142 but we do not know the value of radius. If is a unit circle we can give acurate %
Wiki User
∙ 14y ago
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ByWhat percentage is the cross sectional area of a circle increased if the radius is doubled?
300. (Doubling the radius multiplies the area by four times.)
When the radius of a circle is tripled what happens to the area?
It is increased nine fold. New Area = 9*old area.
What is the area of a circle if the radius is 9m?
The area of a circle if the radius is 9m 254.5m2
What is the radius of a circle with the area of 36?
The radius of a circle with the area of 36 is 3.385
What is the area of a circle of the radius of 10m?
A circle with a radius of 10m has an area of 314.16 m2
What happens to the area of a circle of its radius is increased by100 percent?
The area is increased by 300%.
If a radius of a circle is increased by 10 percent by what percent does its area increase?
area goes as radius squared 1.1 x 1.1 = 1.21 or 21%
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%
How many degrees in an exterior angle?
if the radius of a circle is increased 100% the area is increased
A portion of the area of a circle?
pi X radius squared X the percent of the circle.
If radius of a circle is diminished by 10 percent then it's area is diminished by?
Radius 10, area = 100 pi; radius 9, area = 81 pi
ByWhat percentage is the cross sectional area of a circle increased if the radius is doubled?
300. (Doubling the radius multiplies the area by four times.)
When the radius of a circle is tripled what happens to the area?
It is increased nine fold. New Area = 9*old area.
The radius of a circle has increased by 20 percent By what percentage does the area increase?
((x*1.2)^2*pi-x^2*pi)/(x^2*pi)=0.44where X is the old radius((the new area - the old area) divided with the old area)The area increases with 44%
If the circumference of a circle is increased by 50 then the area will be increased by?
there is no constant that will calculate this, since circumference is calculated with only radius and area with radius squared. you will have to calculate the radius using the initial circumference and then the radius again for the new circumference (with the 50 added). then calculate an area for each radius..then you can see the increase.
What is the area of a circle if the radius is 9m?
The area of a circle if the radius is 9m 254.5m2
What is the radius of a circle with the area of 36?
The radius of a circle with the area of 36 is 3.385
