Question

from a bangle of radius 3 cm,a piece is to be cut to make a ring of radius 1/2 cm what should be the central angle of the piece to be cut out​

Answer 1

Step-by-step explanation:

Given  

from a bangle of radius 3 cm,a piece is to be cut to make a ring of radius 1/2 cm what should be the central angle of the piece to be cut out

• Given radius of bangle = 3 cm
• Radius of ring = 1/2 cm
• We know that circumference of circle = 2 π r cm
• Length of ring = 2 x π x 1/2  
•                          = π cm
• Therefore length of arc = π cm
• In a circle of radius r,  
• Length of arc = x/360 x 2 x π x r cm, given r = 3 cm
• So π = x/360 x 2 x π x 3
• So x = 360 π / 2 x π x 3
• Therefore x = 360 / 6
•       So x = 60 degree

Reference link will be

https://brainly.in/question/1341032