The area covered by the reservoir is 0.28 square kilometers.
Step - by - Step Explanation
What to find? Area of the circular rectangle.
Given Parameters:
diameter = 0.6km
π= 3.14
Since d=0.6, then radius = d/2 = 0.6/2 = 0.3
To find the area of the circular water reservoir, we will use the formula below:

Substitute the values into the formula and simplify.

![\approx0.28\operatorname{km}]()
Hence, the area covered by the reservoir is 0.28 square kilometers.