<PRE><B>Question 591040</B>
A plane flew 1740 km in 6 hours with tail wind. On return trip, going into the wind,  the plane flew 570 km in 3 hours. What is the planes speed if there was no wind.
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1740 km/6 hr = 290 km/hr
570 km/3 hr = 190 km/hr
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The plane&#39;s airspeed is the average = 240 km/hr
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The term is airspeed, and planes don&#39;t use kilometers.
They use nautical miles and knots.
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