Answer:
The correct answer is option 3
arc length = 7.5π
Step-by-step explanation:
It is given a circle with central angle ADC = 45° and radius = 30 cm
To find the length of arc ABC
From the figure we can see that the central angle of arc ABC = 45°
Therefore the arc length = (45/360) * Circumference
To find the circumference
Circumference = 2πr = 2 * π * 30 = 60π
To find the arc length
Arc ABC = (45/360) * 60π= 7.5π
Therefore arc length = 7.5π
The correct answer is option 3
