2007-08-07 00:28:36 · 6 answers · asked by GANGUNDI V 1 in Science & Mathematics ➔ Mathematics
Do you mean increase in radius?
A1 = 100 m ² = π r ²
A2 = 110 m ² = π R ²
110 / 100 = R ² / r ²
11 r ² = 10 R ²
R ² = (11/10) r ²
R = (1.05) r
R/r = 1.05 = 105%
% increase in radius = 5 %
2007-08-07 03:36:24 · answer #1 · answered by Como 7 · 2⤊ 0⤋
Area of a circle ar.= pi * r ^2
=> r=sqrt(700/22) [ as ar. = 100]
=> r=sqrt(31.8181)
=> r= 5.640
if area is increased by 10% then increase in radius is to be found
say the new radius is r1
100+10= pi * r1^2
r1=sqrt(110/pi)
r1=5.916
increase in radius of circle is 5.916-5.640= .276
2007-08-07 01:12:33 · answer #2 · answered by Anonymous · 0⤊ 1⤋
for the orignal circle
area=pi* r^2
100=22/7*r^2
r^2=350/11
r=5.64
10% increase in area means 110m^2
area=pi* r^2
110=22/7*r^2
r^2=35
r=sqrt(35)=5.916
percent increase=4.85%
2007-08-07 00:45:06 · answer #3 · answered by shubham_nath 3 · 0⤊ 0⤋
area is a function of size squared, so the size increase will be sqrt(1.1) = 1.0488 approx or 4.88%
2007-08-07 00:39:48 · answer #4 · answered by Graham P 2 · 0⤊ 0⤋
% increase in the perimeter length - 4.9%
2007-08-07 00:47:57 · answer #5 · answered by Brainsipus 1 · 0⤊ 0⤋
a circle doesn't have sides
2007-08-07 00:37:16 · answer #6 · answered by mumontherun 4 · 1⤊ 0⤋