Question

One circle has a radius of 98 cm and second has concentric circle has a radius of 1 and 26 cm how much longer the circumference of secound
circle than that of first

Answer 1

Answer:

First convert all the units to one unit over here I've converted it to cm

Then taking 2π common out

Subtract the radius ..

U will b getting 176cm

Hope this will help u

Answer 2

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.