document.write( "Question 305893: At full speed an airplane can travel 2800 miles with the wind in 4 hours but it requires 7 hours to travel the same distance against the wind. In miles per hour what is the maximum speed of the plane in air? \n" ); document.write( "
| Algebra.Com's Answer #218978 by Alan3354(69443)     You can put this solution on YOUR website! At full speed an airplane can travel 2800 miles with the wind in 4 hours but it requires 7 hours to travel the same distance against the wind. In miles per hour what is the maximum speed of the plane in air? \n" ); document.write( "------------------ \n" ); document.write( "2800/4 = 700 mph \n" ); document.write( "2800/7 = 400 mph \n" ); document.write( "The airspeed is the average = (700+400)/2 \n" ); document.write( "= 550 mph \n" ); document.write( " \n" ); document.write( " |