Explanation:
Area of shaded region = Area of rectangle - Area of semi circle
=
l
×
b
−
1
2
π
r
21
14
22
7
294
77
217
cm
Perimeter of shaded region =
+
42
78
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Answers & Comments
Explanation:
Area of shaded region = Area of rectangle - Area of semi circle
=
l
×
b
−
1
2
π
r
2
=
21
×
14
−
1
2
×
22
7
×
7
×
7
=
294
−
77
=
217
cm
2
Perimeter of shaded region =
2
l
+
b
+
π
r
=
2
×
21
+
14
+
22
7
×
7
=
42
+
14
+
22
=
78
cm