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72 lines
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72 lines
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<h1 class="puzTitle">Santos-Dumont: Flying Balloon Puzzle - Solution</h1><div class="puzPuzzle"><h2>The Puzzle:</h2><div class="puzText"><div class="puzThumb"><a href="sam-loyd-puzzles-index.html"><img src="images/santos-dumont.jpg" width="249" height="311" alt="Santos-Dumont: Flying Balloon" style="border-style: none" /></a></div>A balloon propelled by some mechanical device travels five miles in ten minutes with the wind, but requires one hour to go back again to the starting point against the wind, how long would it have taken to go the whole ten miles in a calm, without any wind?</div></div><div class="puzSep"></div><div class="puzSoln"><h2>Our Solution:</h3><div class="puzSolnText">The balloon travels five miles in ten minutes with the wind, but requires one hour to go back to the starting point against the wind. <br />
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In 10 minutes it would travel 5/6 miles against the wind. <br />
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So, in 20 minutes it would travel 5+5/6 miles in calm, without any wind i.e. it would take 20x6/35x10 minutes i.e.34 minutes 17 and 1/7 seconds to go the whole ten miles in a calm, without any wind.</div></div><div class="puzAuthor">Puzzle Author: Loyd, Sam<br /><br /></div><div class="puzSolnFtr">See this puzzle <a href="santos-dumont-flying-balloon.html">without solution</a><br />Discuss this puzzle at the <a href="http://www.mathisfunforum.com/index.php">Math is Fun Forum</a></div><div class="related"><a href="sam-loyd-puzzles-index.html">Sam Loyd Puzzles</a><a href="index.html">Puzzles Index</a></div><!-- #EndEditable --></div>
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