Question

3 hours 6 minutes 45 seconds Plus 8 hours 55 minutes 20 seconds

Answer 1

12h 2 minutes and 5 seconds

1) Adding 3 hours 6 minutes and 45 seconds to 8 hours 55 minutes and 20 seconds we can write like this:

2) Every time we hit 60'' (seconds) we add to its neighbor then we can find the following sum.

1h ----60'

1 minute ----60''

3) Then the sum of those is equal to 12h 2 minutes and 5 seconds