defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Quantitative Aptitude Geometry Circles, Chords and Tangents
In a circle with centre O, AD is a diameter and AC is a chord. Point B is on AC such that OB = 7 cm and ∠OBA = 60°, If ∠DOC = 60°, then what is the length of BC?
1
7 cm
2
\(3\sqrt 7\) cm
3
3.5 cm
4
\(5\sqrt 7\) cm