A runner is dragging in a straight line at a steady we are equals 7.4 km/hour. When the runner is L equals 6.3 from the finish line, a bird begins flying straight from the runner to the finish line VV equals 22.2 km/hour parentheses three times as fast as the runner). When the bird reaches the finish line, it turns around and flies directly back to the runner. What cumulative distance does a bird travel? Even though the bird is another assume that it occupies only one point space, travels in a straight line, and I can turn with a loss of speed. Answer in units of kilometers

Distance covered = speed x timethe distance traveled going against the stream = distance traveled with the stream.therefore it is the speed and the time that are the variables.as he travels the same distance both ways, speed x time is the same for each way.going upstream his speed is 4 kph; going downstream his speed is 6 kph.therefore we have two simultaneous equations: time upstream x 4 = time downstream x 6time upstream + time downstream = 60 minutestherefore we have the equation: time upstream = 6/10 hour, time downstream therefore = 4/10 hour.distance traveled at 4km/hr in 6/10 hour = 24/10 = 2.4km.check: distance traveled at 6km/hr in 4/10 hour = 24/10 = 2.4km.

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