15. A wire is in the shape of a regular pentagon of side 12 cm. It is rebent into the
shape of a rectangle whose length 3/2 is times its breadth. Find the length and the
breadth of the rectangle.
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Answer:
Given A wire is in shape of rectangle
where
length=20 cm.
breadth=12 cm.
Perimeter of rectangle =2(l+b)
=2(32)
[Perimeter =64 cm.]
now of wire is bent in shape of square
where side =a cm
now
Perimeter of rectangle = perimeter of square
64=4a
[a=16cm]
side of square formed is 16 cm.
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