Question

the circumference of to concentric rings are 88 cm and 110 cm.find the width between the rings

Answer 1

Circumference of outer ring = 110 cm

=> 2 * pi *r = 110

=> 2*22 *r/7 = 110

=> r = 110 * 7 / 44

=> r = 70/4

=> r = 35/2

=> r = 17.5 cm


Radius of outer ring = 17.5 cm


Circumference of inner ring = 88 cm

=> 2 pi r = 88

=> 2 *22r/7 = 88

=> r = 88 * 7/44

=> r = 2*7

=> r = 14 cm


Width between rings = 17.5 - 14

= 3.5 cm

Answer 2

Circumference of outer ring = 110 cm

=> 2 * pi *r = 110

=> 2*22 *r/7 = 110

=> r = 110 * 7 / 44

=> r = 70/4

=> r = 35/2

=> r = 17.5 cm

Radius of outer ring = 17.5 cm

Circumference of inner ring = 88 cm

=> 2 pi r = 88

=> 2 *22r/7 = 88

=> r = 88 * 7/44

=> r = 2*7

=> r = 14 cm

Width between rings = 17.5 - 14

= 3.5 cm

hope it helped ⚡

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