document.write( "Question 130096: Bryden got a job as a traffic helicopter pilot. She finds that with a tailwind, a 120km distance takes 45 minutes, but that the return trip (into the wind) takes 1 hour. What is the speed of the helicopter? What is the speed of the wind? \n" ); document.write( "
Algebra.Com's Answer #95005 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Bryden got a job as a traffic helicopter pilot. She finds that with a tailwind, a 120km distance takes 45 minutes, but that the return trip (into the wind) takes 1 hour. What is the speed of the helicopter? What is the speed of the wind?
\n" ); document.write( "---------------------
\n" ); document.write( "Let speed of the helicopter be \"h\"; Let sped of the wind be \"w\".
\n" ); document.write( "---------------------
\n" ); document.write( "With the wind DATA:
\n" ); document.write( "Distance 120 km ; time = 0.75 hr. Rate = d/t = 120/0.75 = 160 kph
\n" ); document.write( "-------------------
\n" ); document.write( "Against the wind DATA:
\n" ); document.write( "Distance = 120 km ; time = 1 hr. Rate = d/t = 120 kph
\n" ); document.write( "--------------------
\n" ); document.write( "EQUATIONS:
\n" ); document.write( "h+w = 160
\n" ); document.write( "h-w = 120
\n" ); document.write( "--------------------
\n" ); document.write( "Add to solve for \"h\"
\n" ); document.write( "2h = 280
\n" ); document.write( "h = 140 kph (helicopter speed)
\n" ); document.write( "--------------
\n" ); document.write( "Substitute to solve for \"w\"
\n" ); document.write( "140 + w = 160
\n" ); document.write( "w = 20 kph (wind speed)
\n" ); document.write( "=======================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "
\n" );