adding time

[Rgollar]

im trying to put in a1 15 minutes and then in a2 30 minutes and then have a3
add the total of a1 and a2 and show 45 minutes any help would be greatly
appreciated. thanks in advance

 

[Niek Otten]

A1:
0:15
A2:
0:30
A3:
=A1+A2