In a circle with centre O, a 6 cm long chord is at a distance 4 cm from the centre. Find the length of the diameter.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 10 cm.
r2 = 42 + 32
⇒ r = 5
The diameter of the circle = 2r = 2 × 5
⇒ 10 cm