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Since they are forming a loop, there are 32 segments of 0.6m.
(Just imagine each of them raising left arm to point to the next
person. Since it is a loop, the last person points to the first.
So 32 arms are raised, hence 32 segments.)

So the perimeter 32 x 0.6 = is 19.2m long.

When 8 left, we are left with 24 segments.
So new spacing between scouts must be 19.2/24 = 0.8m

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