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Trlkly · Answer 1 · 2022-11-14T09:05:31+0000

Answer:

3√41

Explanation:

The diagonal can be gotten using the pythagoras theorem

d² = l²+w²

d² = 12²+15²

d² = 144 + 225

d² = 369

d = √9*41

d = 3√41

Hence the diagonal is 3√41