Given data:
The width of the park is b=10.0 cm.
The length of the park is l=5.0 cm.
The scale length 1cm= 4.5 m.
The expression for the area of the park is,
A=lxb
Substitute the given values in the above expression.
A=(5 cm)(10 cm)
=50 cm^2
Substitute 4.5 m for 1 cm in the above expression.
A=50 (4.5 m)^2
=50(20.25 m^2)
=1012.5 m^2.
Thus, the area of the park is 101.5 m^2.