Two concentric rings have a circumference of 132 cm and 176 cm. Find the width
between the rings (use π =22/7
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C1=132
2πr1=132
r1=132/2π
c2=2πr2
2πr2=176
r2=176/2π
width =r2-r1
=176/2π-132/2π
=(44×7)/2×22
=7cm
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