In the given figure, length of BC is:

10 cm

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13 cm

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15 cm

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21 cm

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Solution

The correct option is A
10 cm

Given, AR=4cm, BR=3cm and AC =11cm

We know that, the lengths of tangents drawn from an external point are equal.

AR = AQ = 4cm, BR = BP = 3cm and PC = QC = AC - AQ = 11 - 4 = 7cm

Therefore, BC = BP + PC = 3 + 7 = 10 cm

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