The approximate length of the minor arc is 42 units. The correct option is option B.
What is Arc?
An arc is any smooth curve joining two points. The length of an arc is known as its arc length.
Here, we know that,
Length of arc = angle between the radius X radius
radius is given = 20 cm
Angle = 120⁰ = 2π/3
Now, Length of arc = 2π/3 X 20
= 40π/3
= 13.33 π
= 13. 33 X 3.14
= 41.866
≈ 42
Thus, The approximate length of the minor arc is 42 units. The correct option is option B.
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