Answer: 5.8 cm
Explanation:
Given that the chord is 0.8 cm from the center of a circular ring and the radius r = 3 cm
Using pythagorean theorem to find part of the cord
3^2 - 0.8^2
= 9 - 0.64
= 8.36
Square root of the value above gives 2.89
The length of the chord = 2 × 2.89 = 5.782
= 5.8 cm (to the nearest tenth)