History, 27.08.2021 03:40 alexiagreen1212

An airplane completes a 400 km journey with two different speeds. The first 150 km are done at a speed of 120 km/hr; the remaining 250 km are done at 180 km/hr. Find the time and the plane’s average speed for the whole trip.

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An airplane completes a 400 km journey with two different speeds. The first 150 km are done at a spe...

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