Two circles of radius of 21 cm each intersect each other suc

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Two circles of radius of 21 cm each intersect each other such that each passes through the centre of the other. What is the length of the common chord?

[SSC CHSL 14th March 2023 Shift-1 With Answers]

A

18√3 cm

B

42 cm

C

27 cm

D

21√3 cm

EXPLANATION

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