Let’s mark the entire path that a pedestrian needs to go through S.
By the condition of the problem, it is known that on the first day a pedestrian
passed 2/5 of the entire path.
Therefore, on the first day he covered the distance 2/5 * S
and we can calculate how far a pedestrian will have to walk on the second day. Namely:
S – 2/5 * S = S * (1 – 2/5) = 3/5 * S.
By the condition of the problem, it is also known that the distance that a pedestrian will walk on the second day is 36 km. Means:
3/5 * S = 36,
S = 5/3 * 36 = 5 * 12 = 60.
Answer: the whole path is 60 km.
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