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A track is in the form of a ring whose inner circumference is 352 m and the outer circumference is 396 m. The width of the track is
Width of the track is the difference between the radius of outer circle and inner circle = $$R-r$$
Inner circumference =Β $$2\pi r=352$$
=> $$2\times\frac{22}{7}\times r=352$$
=> $$r=56$$ m
Similarly, $$2\pi R=396$$
=> $$R=63$$ m
$$\therefore$$ Width of the track = $$63-56=7$$ m
=> Ans - (D)
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