Question

A circular park is surrounded by a 2.5 m wide circular path. If outer circumference of circular path is 66 m, then find the inner circumference of the circular path.

Answer 1

Consider outer path ,

2π r. =. 66 m

r. =. 66 / 2π

= 10.5 m

Now consider the inner path,

given that path is 2.5 m wide ,

r. = 10.5- 2.5

= 8 m

Now the circumference

= 2πr

= 2 π 8

= 50.25 m