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  1. A semicircular shaped window has diameter of 63 cm. Its perimeter equals (π = 22/7)
    1. 126 cm
    2. 162 cm
    3. 198 cm
    4. 251 cm
Correct Option: B

Using Rule 14,
Perimeter of semi-circular shaped window
= (πr + 2r) cm = r (π + 2) cm

=
63
22
 + 2 cm
27

=
63
 ×
36
 = 162cm
27


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