Answer:
Total number of plants planted = 1890 Number of plants in each row = 63 \[\therefore \] number of rows \[\text{=}\frac{\text{Total}\,\,\text{number}\,\,\text{of}\,\,\text{plants}}{\text{Number}\,\,\text{of}\,\,\text{plants}\,\,\text{in}\,\,\text{each}\,\,\text{row}}\] \[\text{=}\frac{1890}{63}=30\] Number of plants destroyed in each row = 18 Total number of plants destroyed = Number of rows \[\times \] Number of plants destroyed in the whole field \[=30\times 18=540\]
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