Question

the circumference of a circle exceed its diameter by 30 CM find the radius of the circle​

Answer 1

$Circumferene of circle = 2πr</p><p>given, circumference exceeds its diameter by 30 meters \\ \\ </p><p>i.e, 2πr = d+30. But, diameter(d) = 2r \\ \\ </p><p>2πr = 2r+30 => 2r(π-1) \\ = 30 => r((22/7)-1) = 15 \\ \\ </p><p>r = 15*(7/15) = 7cms$

Answer 2

Question :-

the circumference of a circle exceeds its diameter by 30 centimetre find the radius of the circle ?

Solution :-

Given :-

exceeds diameter of the circle = 30CM .

What to find here ?

we have to find the radius of the circle .

Now,

circumference of circle = 2πr

it is given that the circumference exceeds its diameter by 30 Cm.

so ,

2πr = d+30

∆ Note :- here the D denotes to the diameter and the R denotes to the radius .

2πr = 2r+30

=> 2r(π-1) =40

=> r(( 22/7)-1)=15

now we have to find the radius ,

r = 15 × (7/15)

r = 7 cm ( as the both 15 will be canceled )

Answer :-

hence the Radius is 7 cm