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A chord of length 39 cm is at a distance of 10.4 cm from the centre of a circle. Find the radius of the circle.
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- 19.5 cm. (appr.)
- 22.1 cm.(appr.)
- 28.6 cm. (appr.)
- 2. 21 cm. (appr.)
Correct Option: B
On the basis of question we draw a figure of a circle with centre O
OC ⊥ AB
| ∴ AC = CB = | = 19.5 cm. | |
| 2 |
OC = 10.4 cm
∴ Radius of circle = OA = √OC² + CA²
OA = √(10.4)² + (19.5)²
OA = √108.16 + 380.25
OA = √488.41 = 22.1 cm
