RRB NTPC Mains or Stage 2 Model Paper 10 with solutions

Question : 29 of 120

Marks: +1, -0

The radius of a circle is 13 cm and xy is a chord which is at a distance of 12 cm from the centre. The length of the chord is

Solution:

(b) From figure,

XM =

√{13^2 -12T^2}

= √{169 -144} = 5

∴Length of the chord = 2 × XM
= 2 × 5 = 10 cm

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