3.5 cm and 5.5 cm
Steps of construction:
Step 1: Draw a rough image and mark the given measurement.
Step 2: Take any point O and mark it’s as centre.
Step 3: With O as centre, draw a circle of radius OA = 3.5 cm.
Step 4: With O as centre, draw a circle of radius OB = 5.5 cm.
Thus, the concentric circle C1 and C2 are drawn.
Width of the circular ring = OB – OA
= 5.5 – 3.5
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