Answer:
Area of the square park \[=\text{side}\times \text{side}\] \[=\text{6}0\times \text{6}0=\text{36}00\text{ }{{\text{m}}^{\text{2}}}\] \[\therefore \] Area of the rectangular park = Area of the square park \[\text{= 3600 }{{\text{m}}^{\text{2}}}\] \[\Rightarrow \] \[l\times b=3600\] \[\Rightarrow \] \[90\times b=3600\] \[\Rightarrow \] \[b=\frac{3600}{90}=\text{40 ma}\] Hence, the breadth of the rectangular park is 40 m.
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