The circumference of a circle is measured as 28cm with an error of 0.01cm. The percentage error in the area is

Explanation

let say `c=`circumference

`A=` area

`r=` radius

`c= 28 = 2 pi r`

`r = 14/pi`

`del c = 2 pi del r= 0.01`

`del r= 001/(2 pi)`

`A= pi r^2`

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