Question

A circular dam has a radius of 10.0 m and a height of 3.0 m. Of the dam will be filled with water from a pipe with an inside diameter of 10 cm and a water flow of 10 litres per second, calculate the time taken to fill the dam to a point 10 cm from the top of the dam.

Answer 1

All you need is the volumetric flow rate (10L/s) and the volume pi r^2 h.
convert L to m^3

Answer 2

Time=Volume/Rate (t=v/Q)
Where Volume is V=r^2h
●V=(10)^2(3)
=300m^3

●Q=10/1000=0.01m^3/s

●T=v/Q
=300/0.01
=30000sec...