document.write( "Question 515522: If a runner runs the mile in 4 minutes and 15 seconds. What is his speed in miles/ hours?
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Algebra.Com's Answer #344027 by drcole(72) $\"\"$ $\"About$

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Our runner ran a mile in 4 minutes and 15 seconds. To figure out his speed in miles per hour, we first need to convert 4 minutes and 15 seconds into hours. There are 60 seconds in a minute, so 15 seconds is:\r
\n" ); document.write( "\n" ); document.write( " $\"15%2F60+=+0.25\"$ minutes\r
\n" ); document.write( "\n" ); document.write( "So 4 minutes and 15 seconds is 4.25 minutes. There are 60 minutes in an hour, so 4.25 minutes is:\r
\n" ); document.write( "\n" ); document.write( " $\"4.25%2F60\"$ hours, or, to the nearest ten thousandth, 0.0708 hours.\r
\n" ); document.write( "\n" ); document.write( "So the runner ran 1 mile in $\"4.25%2F60\"$ hours. This gives us a speed of:\r
\n" ); document.write( "\n" ); document.write( " $\"%281%29%2F%28%284.25%29%2F%2860%29%29+=+60%2F4.25\"$ mph, or, to the nearest hundredth, 14.12 mph.
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