The inner circumference of a circular race track, 14 m wide, is 440 m. Find radius of the outer circle. Choices
A) 84	B) 86	C) 82	D) 80	E) none of them

Rationale: let inner radius be r metres . then , 2 ( 22 / 7 ) r = 440 = r = ( 440 x ( 7 / 44 ) ) = 70 m . radius of outer circle = ( 70 + 14 ) m = 84 m . answer is a
Answer: A