Mensuration Practice Test 7

Question : 3 of 40

Marks: +1, -0

The perimeter of a semicircle is 36 cm. Its diameter (in centimetres) is…….

Solution:

Perimeter of the semicircle = 36 cm
πr + 2r = 36
r (π + 2) = 36

r({22}/7+2)

= 36

r({36}/7)

= 36
r =

{36×7}/{36}

= 7
Diameter = 14 cm

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