Mensuration Practice Test 6

Question : 27 of 40

Marks: +1, -0

The perimeter of a semi-circular area is 18 cm, The radius is: (using π = 88/7)

Solution:

Perimeter of the semi circle area =

{πr^2}/2

{πr^2}/2

= 18 cm

r^2

18×7/{22}×2

r^2

{25^2}/{2^2}

= 11.45
r = 3.38
r =

3 1/2 cm

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