30m
-8 + (5m - 6m) = -8 + (-m) = -8 - m
(1 x 5 x 6) = 30 m3
It is: 11*5*6 = 330 cubic meters
1m times 5m times 6m
11
30 m^2
The 6m head pump can lift 6 meters. The 5m head pump can lift 5m. Note this has no impact on the volume of liquid that is pumped.
5m - 6 + m + 10 = 6m + 4
-1
30 square meters
as you are trying to work out the area. W x L = area. So. 5m x 6m = 30m2