Question 389823
the velocity is
{{{400/20}}} m/sec x {{{60}}} sec/min x {{{60}}} min/hr
Just looking at the units, you have
(m/sec) x (sec/min) x (min/hr)
This can be rearraged to look like
(sec/sec) x (min/min) x (m/hr)
resulting in m/hr for units
{{{400/20 * 60 * 60 = 20*3600}}}
{{{20*3600 = 72000}}}
72,000 m/hr