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Solution


Q.

A brooch is crafted from silver wire in the shape of a circle with a diameter of 35 mm. The wire is also used to create 5 diameters, dividing the circle into 10 equal sectors, as shown in the figure.

Based on the above information, answer the following questions:

 

(ii) What is the circumference of the brooch
1 110 mm  
2 120 mm  
3 115 mm  
4 129 mm  

Ans.

(1)

Circumference of the brooch =2πr

=2×227×17.5=44×2.5=110 mm