1. ## Dynamic volume formula

I need a formula to size a rainwater tank based on:

a. 18.7 litres per second entering the tank over a 11.6 minute duration

b. 1.3 litres per second discharging from the tank.

2. ## Re: Dynamic volume formula

Can't you just say the maximum volume of the tank required is $(18.7-1.3) \times 11.6\times 60$ ?