Given:
The perimeter of a semi-circle is 56.54 cm.
π = 3.14
Concept used:
Perimeter of a semi-circle = πr + 2r
Diameter = 2r
Solution:
r(π + 2) = 56.54
r(π + 2) = 56.54
r =
r = 11
Diameter = 2r = 2×11 =22 cm
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