Two planes start from a city and fly in opposite directions, one averaging a speed of
40 kmph greater than the second. If they are 3400 km apart from each other in
5 hours, the sum of their average speeds, is
a) 680 kmph
b) 360 kmph
c) 320 kmph
d) 640 kmph
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Two planes start from a city and fly in opposite directions, one averaging a speed of 40 km/h greater than the others. If they are 3400km apart after 5h, the average speeds,respectively are a. 330,370 km/h
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