Speed of a boat in standing water is 10kmph and speed of…

Speed of a boat in standing water is 10kmph and speed of the stream is 2kmph. A man can rows to a place at a distance of 100km and comes back to the starting point. The total time taken by him is?

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

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #47270