Question

http://www.chegg.com/homework-help/questions-and-answers/20-ft-30-ft-swimming-pool-filled-water-depth-measured-5-ft-intervals-starting-one-corner-p-q3882011

Answer 1

I need only left end

Answer 2

dA=25

Answer 3

so 25(f(0,0)+f(5,0).........+f(30,0))?

Answer 4

this is rieman sum for double interal

Answer 5

I spent some time looking at this. Don't quote me on this but rather consider it.

The way I am seeing it is that, we do split these up into the 5x5 squares. dA = 25.
And then we have to choose a "representative depth" for each square. This can be any one of the corners, although I think the lower estimate will be if we choose towards the lower depth values, and higher if we choose towards the higher depth values.