Two planes start from a city and fly in ...

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 3400 km apart after 5 h. Their average speeds are

320 km/h, 360 km/h

320 km/h, 90 km/h

320 km/h, 280 km/h

None of these

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