A 20ft by 28ft swimming pool is filled with water. The depth is measured at regular intervals, starting at one corner of the pool, and the values are recorded below

	0	7	14	21	28
0	2	4	4	5	5
5	4	7	8	8	10
10	4	4	6	6	9
15	2	3	4	5	9
20	2	3	4	7	7

Estimate the volume of water in the pool using the Midpoint Rule with $\displaystyle {m}={n}={2}$

Volume = Preview Question 6   ft³