Your Swine manure pit is rectangular measuring 50' by 100' and is 4' deep. If you use a 1" diameter hose 2 hours each day at 8 ft per second velocity to remove the manure from your swine pins how many days worth of storage space do you have in your pit? In other words how often will you have to pump out your pit? Assuming no loss to evaporation?

The amount of material is volume rate times time.

Volume= 8ft/sec*areahose*time

solve for time.

areahose is the cross sectional area of the one inch diameter hose.

You need to post your thinking or work, or what is stumbling you on these. Otherwise, it will appear you are an answer moocher.
We will be happy to critique your thinking or work.