perimeter of the figure is
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534m
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circumference of the semicircle in the figure = π r
diameter = 14cm
radius = 7cm
length of rectangle = 35m = 3500cm
perimeter of the racing track = 2× length of rectangle + 2× circumference of semicircle
= 2× 3500 + 2× π r
=7000 + 2× 22/7 ×7
= 7000 + 44
= 7044cm or 70.44m
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