minutes

How many minutes are in one day ?

$$\dfrac {24~\rm{h} } { 1~\rm{day} } \cdot \dfrac { 60~\rm{min.} } { 1~\rm{h} }\\\\
= 24\cdot 60~\dfrac { \rm{min.} } { \rm{day} } \\\\
= 1440 ~\dfrac { \rm{min.} } { \rm{day} }$$

1440 minutes are in one day.

86400/60 or

1440