Discussion

Explanation:

 
Area of parallelogram = Base × Height

∴ 48 = 8 × Height

∴ Height = 6 cm

If the parallelogram is a rectangle, AD is its height. In that case, s = 6.

Otherwise, using Pythagoras theorem, AD > 6 or s > 6.

Therefore, s ≥ 6.

Hence, option (b).

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