A man can row upstream at 4kmph and downstream at 10 kmph

A man can row upstream at 4kmph and downstream at 10 kmph. The speed of the stream is

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #38584

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