One circle has a radius of 98cm and a second concentric circle has a radius of 1m 26cm.How much longer is the circumference of the second circle than that of the first?
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using formula we have to find the circumference of the both circles and subtract the circumference of first circumference to second circumference
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Radius of first circle= 98cm.
Circumference of First circle = 2πr = 2×22/7×98 = 2×22×14 = 616cm.
Radius of concentric circle = 1m26cm = 100×26 = 2600cm.
Circumference of concentric circle = 2πr = 2×22/7×2600 = 114400/7= 16342.85cm.
length Circumference of second circle - Length of first circle = 16342.85-2600= 13742.85cm.
Hence,
The circumference of second circle is 13742.85cm longer than First circle
Circumference of First circle = 2πr = 2×22/7×98 = 2×22×14 = 616cm.
Radius of concentric circle = 1m26cm = 100×26 = 2600cm.
Circumference of concentric circle = 2πr = 2×22/7×2600 = 114400/7= 16342.85cm.
length Circumference of second circle - Length of first circle = 16342.85-2600= 13742.85cm.
Hence,
The circumference of second circle is 13742.85cm longer than First circle
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