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Snow tires-An Increase in radius

Source: 1970 AHSME Problem 21

March 24, 2014
AMC

Problem Statement

On an auto trip, the distance read from the instrument panel was 450450 miles. With snow tires on for the return trip over the same route, the reading was 440440 miles. Find, to the nearest hundredth of an inch, the increase in radius of the wheels if the original radius was 1515 inches.
<spanclass=latexbold>(A)</span>.33<spanclass=latexbold>(B)</span>.34<spanclass=latexbold>(C)</span>.35<spanclass=latexbold>(D)</span>.38<spanclass=latexbold>(E)</span>.66<span class='latex-bold'>(A) </span>.33\qquad<span class='latex-bold'>(B) </span>.34\qquad<span class='latex-bold'>(C) </span>.35\qquad<span class='latex-bold'>(D) </span>.38\qquad <span class='latex-bold'>(E) </span>.66