document.write( "Question 314384: An airplane flew for 3 hr with a 45 mph tailwind. The return flight against the same wind took 4 hr. Find the speed of the plane in still air. \n" ); document.write( "

Algebra.Com's Answer #224862 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
Rate*Time=Distance
\n" ); document.write( " $\"%28V%2B45%293=D\"$
\n" ); document.write( " $\"%28V-45%294=D\"$
\n" ); document.write( "Since they both equal D set them equal to each other and solve.
\n" ); document.write( " $\"3%28V%2B45%29=4%28V-45%29\"$
\n" ); document.write( " $\"3V%2B135=4V-180\"$
\n" ); document.write( " $\"-V=-315\"$
\n" ); document.write( " $\"highlight%28V=315%29\"$
\n" ); document.write( "The plane speed in still air is 315 mph. \n" ); document.write( "

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