Question -
Answer -
┬аFind:
(i) the total lengthof the silver wire required.
(ii) the area ofeach sector of the brooch.
Diameter (D) = 35 mm
Total number of diameters to be considered= 5
Now, the total length of 5 diameters thatwould be required = 35├Ч5 = 175
Circumference of the circle = 2╧Аr
Or, C = ╧АD = 22/7├Ч35 = 110
Area of the circle = ╧Аr2
Or, A = (22/7)├Ч(35/2)2┬а=1925/2 mm2
(i)┬аTotal length of silver wire required = Circumference ofthe circle + Length of 5 diameter
= 110+175 = 185 mm
(ii)┬аTotal Number of sectors in the brooch = 10
So, the area of each sector = total area ofthe circle/number of sectors
тИ┤ Area of each sector = (1925/2)├Ч1/10 = 385/4 mm2