MathDB
Enlarging a Circle

Source: 1968 AHSME Problem #1

August 31, 2011
AMC

Problem Statement

Let PP units be the increase in the circumference of a circle resulting from an increase in π\pi units in the diameter. Then PP equals:
<spanclass=′latex−bold′>(A)</span> 1π<spanclass=′latex−bold′>(B)</span> π<spanclass=′latex−bold′>(C)</span> π22<spanclass=′latex−bold′>(D)</span> π2<spanclass=′latex−bold′>(E)</span> 2π<span class='latex-bold'>(A)</span>\ \dfrac{1}{\pi} \qquad <span class='latex-bold'>(B)</span>\ \pi \qquad <span class='latex-bold'>(C)</span>\ \dfrac{\pi^2}{2} \qquad <span class='latex-bold'>(D)</span>\ \pi^2 \qquad <span class='latex-bold'>(E)</span>\ 2\pi
Back to ProblemsView on AoPS