the circumference of two concentric circles forming a ring are 88 cm and 66cm respectively . the width of the ring is..?
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width of ring=radius of 2nd circle-radius of 1st circle
circumference of circle= 2pi r
circumference of larger circle=88=2pir
pir=44
r/7=2
r=14
circumference of smaller circle=2 pi r =44
pir=22
r=7
so the width of ring =14-7=7cm
circumference of circle= 2pi r
circumference of larger circle=88=2pir
pir=44
r/7=2
r=14
circumference of smaller circle=2 pi r =44
pir=22
r=7
so the width of ring =14-7=7cm
naveenroy00:
correct me if i am wrong
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