document.write( "Question 1005368: A plane flies at 200 mph for the first and last half hour of a flight. It flies at a higher constant speed for the rest of the flight. The route is 2100 miles. The plane is 1000 miles from the destination 2 hours before the end of the flight. How many hours is the entire flight? \n" ); document.write( "

Algebra.Com's Answer #621698 by MathTherapy(10552) $\"\"$ $\"About$

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A plane flies at 200 mph for the first and last half hour of a flight. It flies at a higher constant speed for the rest of the flight. The route is 2100 miles. The plane is 1000 miles from the destination 2 hours before the end of the flight. How many hours is the entire flight?
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document.write( "Since the plane traveled at 200 mph for the 1st  hr of the flight, then for the 1^st  hour of flight, plane covered () or 100 miles
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document.write( "Since the plane traveled at 200 mph for the last  hr of the flight, then for the last  hr of flight, plane covered (), or 100 miles
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document.write( "Since it traveled 1,000 – 100, or 900 miles,  hours before the last  hour, its speed during this stretch was: , or 600 mph
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document.write( "Since it’s stated that it traveled at a higher constant speed for the rest of the 2,100-mile journey, and itw’s found that its speed for 900 of
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document.write( "the last 1,000 miles was 600 mph, then this is the speed at which it traveled for the remaining 1,000 (2,100 – 100 – 900 – 100) miles of the journey
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document.write( "Therefore, time spent travelling the remaining 1,000 miles (see diagram) = , or  hrs, or  hours
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document.write( "Therefore, total time for the entire trip was: , or  hours, or  \n" );
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