Just do 6/3 because you have the area and one length, just divide the area by the height you have.
Answer:

Step-by-step explanation:
Area of Rectangle = Length * Width
Where Length = 2x and Width = 5x²
Area of Rectangle = (2x)(5x²)
Area of Rectangle = 10x³
The answer is 445363.571429!
Make the denominators equal by multiplying them:

Subtract:

Simplify:

The answer is

or 0.16