MathDB

5

Part of 1962 AMC 12/AHSME

Problems(1)

Radii of circles

Source:

3/2/2010
If the radius of a circle is increased by 1 1 unit, the ratio of the new circumference to the new diameter is: (A)\ \pi \plus{} 2 \qquad (B)\ \frac{2 \pi \plus{} 1}{2} \qquad (C)\ \pi \qquad (D)\ \frac{2 \pi \minus{} 1}{2} \qquad (E)\ \pi \minus{} 2
ratio