Water flows through a pipe with the inner diameter of 20cm at a speed of 1m/s. How long does it take for the water flowing out from the pipe to fill a cylindrical tank with the base radius of 0.8m and the height of 0.5m?

Answer 1

(pi * .8^2 * .5 m^3)
----------------------- = 32 s
(pi * .1^2 * 1 m^3/s)