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Q.

Question Image

What is the width of the ring?


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a

2 cm

b

3 cm

c

4 cm

d

5 cm  

answer is D.

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Detailed Solution

We have been given,
Radius (R)=10cm
Radius (r) =5cm
Question ImageWe know, width of the ring is outer radius -inner radius.
Substituting the values,
W=R-r W=10-5
W=5 cm Therefore, the required value is 5cm.
Hence, option 4 is correct.
 
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