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Two friends are racing. The first friend is running around the rectangular pull with the length of 50m and the second friend is swimming along

Two friends are racing. The first friend is running around the rectangular pull with the length of 50m and the second friend is swimming along the length of the pool. The first friend is running three times faster than the second friend is swimming. When the first friend run 5 times around the pool the second friends swims 6 times lengths of the pool. Find the width of the pool. 

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