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There are 4 identical small sized circles, 1 medium sized circle and a large sized circle in the figure shown here.
The radius of the large circle to the radius of the medium sized circle is 2 : 1.
The radius of the small sized circle is half that of the radius of the medium sized circle.
If the radius of the large circle is 68 cm,
(a) what is the area of the region shaded blue?
(b) what is the perimeter of the region shaded blue?
[ Take π to be 3.14 ]
Notes to students:
- If the question above has parts, (e.g. (a) and (b)), given that the answer for part (a) is 10 and the answer for part (b) is 12, give your answer as:10,12
- Round your answer off to 2 decimal places