Area of the rectangle :
A = L x W
For the tennis court:
A ( Tennis Court ) = 40 m x 20 m = 800 m²
For the basketball court:
A ( Basketball Court ) = 28 m x 15 m = 420 m²
800 m² - 420 m² = 380 m²
Answer: The tennis court is bigger than the basketball court for 380 m². It is not 2 times bigger ( 420 m² x 2 = 840 m² > 800 m² ).