The Area of a ring is528cm and the radius of outer circle is 17 cm
Find the radius of the smaller circle
The width of the ring
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Answer:
Radius of inner circle = r = 11 cm
Width of the ring = R - r = 6 cm
Step-by-step explanation:
Area of the ring = π (R^2-r^2)
Where,
R = Radius of outer circle
r = Radius of inner circle
Given,
R = 17 cm
r = ?
Area of the ring = 528 cm^2
π { (17)^2- r^2} = 528 cm^2
22/7 (289- r^2) = 528 *7/22
289-r^2 = 48*7/2
289- r^2 = 24*7
289- 168 =r^2
121= r^2
11 = r
Radius of inner circle = 11 cm
Width of the ring = difference of outer and inner radius of the ring= R - r =
17-11= 6 cm
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