Answer
9 rpm : 4 rpm
Work Step by Step
1125 rpm : 500 rpm
$\frac{1125}{500}=\frac{/\!\!\!125\times9}{/\!\!\!125\times4}=\frac{9}{4}$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 7 - Section 7.1 - Ratio - Exercises - Page 270: 34
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