Answer: 18m
Step-by-step explanation:
From the question, the opposite corners of the rectangular plot which is 30m is the diagonal while the length of the plot is 24m.
We'll use the Pythagoras theorem to solve this. Therefore,
length² + breadth² = diagonal²
24² + breadth² = 30²
576 + breadth² = 900
breadth² = 900 - 576
breadth² = 324
breadth = ✓324
breadth = 18
Therefore, the breadth of the plot is 18m.