Question

the radii of two circle are 84 centimetre and 98 CM respectively how much longer is the circumference of the second circle then the first​

Answer 1

Answer:

circumference of first circle= 2πr = 2*22/7*84 = 528cm

circumference of second circle = 2πr = 2*22/7*98cm = 616 cm

difference between the circumference= 616cm - 528cm = 88cm

Step-by-step explanation:

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Answer 2

$\huge\mathbb{SOLUTION:-}$

$\sf\underline{\red{\:\:\:\:Given:-\:\:\:\:\:}}$

$\sf \bullet Radii\:of\:two\:circles=84cm\:and\:98cm$

• Now we have to find the circumference of both circles

$\boxed{\purple{\boxed{\sf{Circumference\:of\: circle=2\pi r}}}}$

$\sf\underline{\pink{\:\:\:\: Solution:-\:\:\:\:\:}}$

●Now the circumference of circle 1

$\sf\implies Circumference\:of\:circle_1=2\times \dfrac{22}{\cancel7}\times \cancel{84}\\ \\ \sf\implies C.\:of\:circle_1=2\times 22\times 12\\ \\ \sf\implies {\purple{C.\:of\:circle_1= 528cm{}^{2}}}$

●Now Circumference of circle 2

$\sf\implies Circumference\:of\:circle_2=2\times \dfrac{22}{\cancel7}\times \cancel{98}\\ \\ \sf\implies C.\:of\:circle_2= 2\times 22\times 14\\ \\ \sf\implies{\blue{ C.\:of\:circle_2=616cm{}^{2} }}$

• The difference on both circles circumferences

$\underline{\fbox{\sf{Difference=C.\:of\:circle_2\:-\:C.\:of\:circle_1}}}$

$\sf\implies Difference= 616-528\\ \\ \sf\implies Difference=88cm{}^{2}$

$\underline{\fbox{\blue{\sf{Difference\:in\: their\: circumference=88cm{}^{2}}}}}$