MathDB
Rubber Tire

Source:

February 15, 2009
percentratiogeometrygeometric transformationrotation

Problem Statement

A wheel with a rubber tire has an outside diameter of 25 25 in. When the radius has been decreased a quarter of an inch, the number of revolutions in one mile will: <spanclass=latexbold>(A)</span> be increased about 2%<spanclass=latexbold>(B)</span> be increased about 1% <span class='latex-bold'>(A)</span>\ \text{be increased about }2\% \qquad<span class='latex-bold'>(B)</span>\ \text{be increased about }1\% <spanclass=latexbold>(C)</span> be increased about 20%<spanclass=latexbold>(D)</span> be increased about 12%<spanclass=latexbold>(E)</span> remain the same <span class='latex-bold'>(C)</span>\ \text{be increased about }20\% \qquad<span class='latex-bold'>(D)</span>\ \text{be increased about }\frac {1}{2}\% \qquad<span class='latex-bold'>(E)</span>\ \text{remain the same}