Question

A race track is in the form of a ring whose inner circumference is 220 m
and the outer circumference is 440 m. Find the width of the track.

Answer 1

Answer:

Let the radius of the outer circle be R and inner circle be r.

Outer circumference =506 m

⟹2×  

7

22

​

×R=506 m

R=80.5 m

Inner circumference =440m

⟹2×  

7

22

​

×r=440 m

r=70 m

Hence, width of the track =(80.5−70) m=10.5 m

Step-by-step explanation:

Answer 2

Answer:

220

Step-by-step explanation:

outer circumference - inner circumference

440-220

220