An aeroplane takes 40 minutes less to fly 3600 km with the wind blowing at 30 km/h than the time it takes to fly against the same wind. Find the actual speed of the aeroplane when there is no wind.

• 570 km/hr
  If Actual speed=x & Wind speed=30 km/hr
  Given 3600/(x+30)+(2/3)=3600/(x-30)
  (10800+60+2x)/3(30+x)=3600/(x-30)
  x^2=324900 or x=570
• 11 years agoHelpfull: Yes(0) No(0)