#### Answer

3.5

#### Work Step by Step

We use the equation for volume, letting pi equal 22/7:
$SA= (4)(22/7)l(r^2) \\154= (4)(22/7)l(r^2) \\ r = \sqrt{12.25} = 3.5$

Published by
Brooks Cole

ISBN 10:
1439047901

ISBN 13:
978-1-43904-790-3

3.5

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