Answer : The map needs to be reproduce at a scale of 4 inches so it can fit in a brochure.
Explanation :
Length of rectangular park = 4 inches
Breadth of rectangular park = 6 inches
∴ Area of rectangular park = length × breadth
= 4×6
= 24 square inches
Since the map needs to be reproduce at a different scale so that it has an area of 6 square inches and can fit in a brochure.
So, scale needs to be reproduce =

= 4 inches
∴ The map should be reproduce to 4 inches scale to get fit in a brochure.