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A train travels from city A to city B with a constant speed of 10 ms−1 and return back to city A with a constant speed of 20 ms−1. Find its average speed during its entire journey. |
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Answer» A train travels from city A to city B with a constant speed of 10 ms−1 and return back to city A with a constant speed of 20 ms−1. Find its average speed during its entire journey. |
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