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I need explanation for these two questions for the best?

I need explanation for these two questions for the best?
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I need explanation for these two questions for the best?

I need explanation for these two questions for the best?-example-1
User Bishwajyoti Roy
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22. it is because their is only 1 rope on the left side A.

21. is because the water is raised higher as the sticks are doubled in height.
User Akselsson
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