The inner circumference of a circular race track, 14 m wide, is 440 m. Find radius of the outer circle? Choose the correct choice from the following choices:
A) 22	B) 37	C) 87	D) 84	E) 82
Let inner radius be r metres. Then, 2   r = 440 ; r = = 70 m.   Radius of outer circle = (70 + 14)= 
<gadget id="calculator">(70 + 14)</gadget>
<output>84</output>
84 m.   Answer: 84
<result>D</result>
The inner circumference of a circular race track, 14 m wide, is 440 m. Find radius of the outer circle?