In this figure, there are 8 identical squares lie outside the rectangle ABCD. A semicirde with diameter DP is drawn and shaded. the area of shaded semicircle is 693 cm then the area of rectangle ABCD will be: Use = ” А D B Р (A) 1568 cm (C) 1960 cm? (B) 2352 cm? (D) 2940 cm 20
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ANSWER:Here, l=60m,b=26m and r=
2
28
=14m
⇒ Area of rectangle ABCD=l×b=60×28=1680m
2
radius(r)=
2
BC
=
2
28
=14m
⇒ Area of semicircle =
2
πr
2
=
7×2
22×(14)
2
=308m
2
∴ Area of the plot = Area of rectangle ABCD + Area of a semicircle.
∴ Area of the plot =1680m
2
+308m
2
=1988m
2
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