document.write( "Question 984235: Rate of Descent. A plane descends to sea level from 12,000 ft after being airborne for 1 1/2 hr. The entire flight time is 2 hr 10 min. Determine the average rate of descent of the plane.\r
\n" ); document.write( "\n" ); document.write( "Book's answer is 300ft/min. I tried several methods but couldn't get 300ft/min for my answer. Please help. \n" ); document.write( "
Algebra.Com's Answer #605009 by Alan3354(69443)\"\" \"About 
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Rate of Descent. A plane descends to sea level from 12,000 ft after being airborne for 1 1/2 hr. The entire flight time is 2 hr 10 min. Determine the average rate of descent of the plane.\r
\n" ); document.write( "\n" ); document.write( "Book's answer is 300ft/min. I tried several methods but couldn't get 300ft/min for my answer. Please help.
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\n" ); document.write( "It's not a clearly stated problem. \"after being airborne for 1 1/2 hr.\" implies the descent started then but is not explicit.
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\n" ); document.write( "2 hr 10 - 1 hr 30 = 40 minutes
\n" ); document.write( "12000 ft/40 min = 300 ft/min
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\n" ); document.write( "It's another instance of people who don't know what they're talking about writing math books.
\n" ); document.write( "They should stick to politics.\r
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