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25. Find the perimeter of the shaded region in figure, if ABCD is a square of side 14 cm and APB andCPD are semicircles. (Use = 22/7 )
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Answer:
R.E.F image
ABCD square
area of ABCD =(21)
2
=441cm
2
area of semi circle =
2
π
(
2
21
)
2
=
2×4
π×441
=
11
22
×
2×4
441
=11×
4
63
area of remaining portion :
=441−2(11×
4
63
)
=97.5
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