The boundary of the shaded region in the given figure consists of three semicircular areas, the smaller ones being equal. If the diameter of the larger one is `14` cm, calculate
(i) the length of the boundary
(ii) the area of the shaded region

Explanation

1)`(2piR)/2+(2pir)/2+(2pir)/2`

`=piR+2pir`

`=pi(R+2r)`

`=pi(7+7)`

`=14pi cm`

2)`(piR^2)/2-(pir^2)/2+(pir^2)/2`

`=(piR^2)/2`

`=(pi7^2)/2`

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