A circular road runs round a circular ground. If the difference between the circumferences of the outer circle and inner circle is 66 metres, the width of the road is:  Pick one:
A) 5.25 m	B) 7 m	C) 10.5 m	D) 21 m	E) 22 m

Rationale: 2 π ( r - r ) = 60 = > 2 * 22 / 7 * ( r - r ) = 60 . therefore , ( r - r ) = ( 66 * 7 / 44 ) = 10.5 m answer : c
Answer: C