RRB NTPC Mains or Stage 2 Model Paper 9 with solutions

Question : 14 of 120

Marks: +1, -0

Two parallel chords of a circle of diameter 20 cm are 12 cm and 16 cm long. If the chords are in the same side of the centre, then the distance between them is

28 cm
2 cm
4 cm
8 cm

Validate

Solution:

In ΔADO,

OD = √{(AO)^2 - AD^2}

= 100cm^2 - 64cm^2 = 6 cm

In ΔBCO,

OC = √{OB^2 - CB^2}

√{100cm^2 - 36cm^2 = 8} cm

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