Angle subtended by a chord PQ on the circumference is 90 deg

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Angle subtended by a chord PQ on the circumference is 90 degree. If radius of this circle is 15 cm, then what is the length of PQ?

[SSC CHSL 20th March 2023 Shift-4 With Answers]

A

35 cm

B

40 cm

C

7.5 cm

D

30 cm

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