Question

One circle has a radius of 105 m and a second concentric circle has a radius of 112 m . How much longer is the circumference of the second circle than that of the first ?

Answer 1

here is your answer.

circumference of first circle= 2×22/7×105

=660m.

and, circumference of second circle =2×22/7×112

=704m.

thus, second circle has 44m circumference more than that of first circle.

hope it helps!!

Answer 2

let r1=105

so circumference(c1) =2*22/7*105=660

c2=2*22/7*112=704

c2-c1=704-660=44