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 also find area​

Answer 1

Step-by-step explanation:

Hint: The concept here to be used is to find radius of both inner track and outer track and when we get 

r1r1

and

r2r2

 then from the diagram we can see that width is equal to difference in the radius of both tracks 

(r1−r2)(r1−r2)

 when 

r1>r2r1>r2

Complete step by step solution:



Also formula for circumference

=2πr=2πr

⇒⇒

Inner circumference of track 

=352=352

m

Let us assume radius to be 

r2r2

2πr2=352m2πr2=352m

 ……. 1

⇒⇒

Outer circumference of race track 

=396m=396m

Let us assume radius to be 

r1