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Lap times of two skaters are 12 s and 20 s. Skating in opposite directions from the same mark, at how many distinct points of the rink do they meet?

Competition practiceRaces & Circular Tracks

A8
B2
C15
D4

Step-by-Step Solution

Speeds are inversely proportional to lap times:

\frac{1}{12} : \frac{1}{20} = 5 : 3

. Opposite directions:

5 + 3 = 8

distinct points.

Answer: A) 8

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