Q1 of 18 Page 226

A wire is in the form of a semicircle of radius 7 cm. Find the length of the wire.

Given the radius of semicircular wire is 7 cm.



We have, Circumference of a semicircle = πr, where r is the radius.


Total Length of the Wire = Circumference of semi Circle + 2 r


Total Length of the wire = πr + 2r


Here, r = 7 cm



⇒ C = 22 + 14 = 36 cm


Hence, the length of the wire is 36 cm.


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