Question

The circumference of a circle exceeds the diameter by 16.8cm. Find the circumference of the circle.

Answer 1

ATQ, 
 
2πr = D + 16.8
2πr= 2r + 16.8
2πr - 2r = 16.8
2r (π - 1) = 16.8
2r ( 3.14 - 1) = 16.8
2r (2.14) = 16.8
2r = 16.8 /2.14
2r = 7.9 ...........................................(approx)
r = 7.9/ 2
r = 3.95 cm  ...or 4 cm 

now, 
circuference of circle = 2πr
                                  = 2 *22/7*4
                                 = 25.14 cm ( approx)


The answer may be different but it will be near to 25.24

If helpful mark as brainliest

 

Answer 2

let us get the value of 'r'
A/Q
  2 x r + 16.8 = 2 pi r
 16.8 = 2 pi r - 2 r
 16.8 = 2r(3.14 -1)
 16.8 =2r x 2.14
 16.8/2.14 x 2 = r
 3.95= r

now circumference is = 2 x 3.14 x 3.95
                                   = 24.8


circumference is 24.8 cm