The plane flew 90 km, which is 1/6 of the way. How much is left for him to fly.

90/1 = 1/6
The entire path is divided into 6 parts, therefore, if one part takes 90 km, then the entire path is
90 × 6 = 540 km
Since he has already flown 90 km, it remains for him to fly
540-90 = 450 km
Answer: 450 km



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