Question

The difference between circumference and diameter of a circle is 105 cm. Find th radius of the circle

Answer 1

Answer:

$\frac{49}{2\\}$

Step-by-step explanation:

let the radius of the circle be r

=> circumference=  2πr

=> diameter= 2r

according to the question,

2πr-2r= 105

=> 2r(π-1)= 105

=> 2r($\frac{22}{7}$-1)= 105

=> 2r ($\frac{15}{7}$)=105

=> 2r = 105 ×$\frac{7}{15}$

=> 2r= 49

=> r= $\frac{49}{2}$