Question

the difference of two radii of two circle is 21 m and the sum of their circumference is 660 m, find the radii of the circle

Answer 1

Answer:

ANSWER

Let the radii of the two circles be r

1

and r

2

Given, r

1

+r

2

=140

⟹r

1

=140−r

2

--------(i)

Also, 2πr

1

−2πr

2

=88

⟹r

1

−r

2

=

2π

88

Putting the value of r

1

from equation (i), we have

⟹40−r

2

−r

2

=

2×22

88×7

⟹2r

2

=140−14

⟹r

2

=63

Putting the value of r

2

in (i), we get

⟹r

1

=140−63

⟹r

1

=77

Thus, the two radii are 77 cm and 63 cm.

Answer 2

Answer:

77 m 63 m

Step-by-step explanation:

r1-r2 =21

r1+r2 =330/3.14