Math, asked by jrdsinha, 1 year ago

One circle has a radius of 98 cm and a second concentric circle has a radius of 1 m 26 cm . How much longer is the circumference of the second circle than that of the first ?

Answers

Answered by Anonymous
19
Circumference of smaller circle =2πr
=2×π×98 =
616cm {}^{2}
Circumference of larger circle =2πr
=2×π×126
792cm { }^{2}
Therefore the second circle is
176cm {}^{2}
longer than the smaller circle

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Answered by THEmultipleTHANKER
3

Given:-One circle has a radius of 98 cm and a second concentric circle has a radius of 1 m26 cm or 126cm

To find out:-How much longer is the circumference of the second circle than that of first?

Solution:-

Let the radius of outer circle be r1 and inner circle be r2 .

CIRCUMFERENCE of inner circle = 2πr1

=>2×22/7×98

=>616 cm

CIRCUMFERENCE of outer circle = 2πr2

=>2×22/7×126

=>792 cm

DIFFERENCE of outer circle and inner circle

=>792-616=176 cm

circumference of the second circle is 176 cm longer than that of first.

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