Sewage flows through a 12" diameter pipeline then through an 18" diamenter pipeline. The flow is the same (unknown) value in each pipe, and the slope is the same (unknown) contant value for both pipes. you can assume a constant (unknown) of "n" for all conditons.
If the sewage has a 7" depth in the 12" diameter pipeline, what is its depth in the 18" diamenter pipeline?