A circular box kept around a circular place. If the difference between the circumference of the outer circle and the inner circle is 44m, find the width of the box?  Choose the correct choice from the following answers.
A) 6 m B) 9 m C) 10 m D) 7 m E) 11 m
Let radius of the outer circle be R and radius of the inner circle be r.   Circumference of the outer circle =   Circumference of the inner circle =   But,   or, R - r =   Thus, width of the road = 7 m   7 m
<result>D</result>
A circular box kept around a circular place. If the difference between the circumference of the outer circle and the inner circle is 44m, find the width of the box?