Question

The area of a circle exceeds the daimeter by 30cm.find its diameter ​

Answer 1

Answer:

Circumferene of circle = 2πr

given, circumference exceeds its diameter by 30 meters

i.e, 2πr = d+30. But, diameter(d) = 2r

2πr = 2r+30 => 2r(π-1) = 30 => r((22/7)-1) = 15

r = 15*(7/15) = 7cms

Hope it's help you.....