Question

the circumference of a circle exceeds the diameter by 16.8 cm. find the radius of the circle ?

Answer 1

$<b><i>$ let the radius of the circle be r cm.


given

circumference of a circle

= Diameter of a circle + 16.8

2πr = 2r+16.8


$2 \times \frac{22}{7} \times r = 2r + 16.8$


44r= 14r +16.8×7

30r=117.6

$r = \frac{17.6}{30} = 3.92cm$


hence the radius of a circle is 3.92 cm


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