Answer :

Steps of construction:
1. Draw concentric circle of radius 4 cm and 6 cm having same centre .

2. Locate a point P on the circle whose radius is 6 cm.

3.Join the points O and P through lines such that it becomes OP.

4. Draw the perpendicular bisector to the line OP

5. Let O' be the mid-point of PO.

6. Draw arc with centre M as on the small circle on R and Q

7. Join PQ and PR.

10. PQ and PR are the required tangents.

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