We know that Length of chord,

Where r = radius of circle, d = distance of chord from centre

Given radius = 13 cm and chord = 10 cm

Now,

Squaring on both sides,

100 = 4 (169 – d2)

100/ 4 = 169 – d2

25 = 169 – d2

d2 = 169 – 25

d2 = 144

Distance of chord, d = 12 cm

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