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2 is definitely sufficient since you can add the 3 vertical lines on the left side (=6) and subtract the one on the right to calculate the length of /. But how is 1 sufficient?

If you know the length of red line, through the diagram you can know the length of vertical green line as it is equal to two vertical red lines. this will be same as horizontal green line and hence length of AB can be found. Similarly, if you know the length of green line, you can find length of red line and hence AB

+1 for D Red line is half of green line.
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2 is definitely sufficient since you can add the 3 vertical lines on the left side (=6) and subtract the one on the right to calculate the length of /. But how is 1 sufficient?

3R=1G+1R 2R=1G Knowing either R or G gives the answer.

Re: What is the length of line segment AB? All / s are equal, [#permalink]

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