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Math and Logic

Running Round in Circles

Two siblings are walking home from school: Alana at 6 km/h\SI[per-mode=symbol]{6}{\km\per\hour} and Barry at 5 km/h.\SI[per-mode=symbol]{5}{\km\per\hour}. When Alana arrives home, she regrets about walking too fast for her brother to catch up. So, she turns around and begins to walk back at 4 km/h\SI[per-mode=symbol]{4}{\km\per\hour} until meeting Barry 0.1 h\SI{0.1}{\hour} later. How far do they live from school? Keep reading to find out, or jump straight to today's challenge.

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