railway DFCCIL Executive 2025 Mock Test Quantitative Aptitude Geometry Circles, Chords and Tangents

In a circle with centre O, AB and CD are two parallel chords on the same side of the diameter. If AB = 12 cm, CD = 18 cm and distance between the chords AB and CD is 3 cm, then find the radius of the circle (in cm).

1
15
2
9
3
3√13
4
12
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