Answer: The streets are 225 feet apart.
Explanation:
Since we have given that
Length of frontage on one street = 500 feet
Length of frontage on other street = 300 feet
Area of this figure = 90000 sq. feet
Let the distance between the street be 'h'.
Since it forms trapezium:
So, Area of trapezium would be
![90000=(1)/(2)* h* (a+b)\\\\90000=(1)/(2)* h* (500+300)\\\\90000* 2=800* h\\\\180000=800* h\\\\h=(180000)/(800)\\\\h=225\ ft](https://img.qammunity.org/2020/formulas/mathematics/high-school/5hlog869hn8qau0eblfywvlyvh53837tql.png)
Hence, the streets are 225 feet apart.