Four hours and twenty minutes earlier in math can be calculated by subtracting the given time duration from the current time.
3:55
There are 4 hours and 20 minutes in 260 minutes
260 minutes.
(11 hours 25 minutes 20 seconds) + (4 hours 5 minutes 35 seconds) = 15 hours 31 seconds.
4 1/3 hours
It is: 4 hours and 10 minutes
4 hours and 20 minutes.
4 hours, 20 minutes 4 and 1/3 hours
A bacteria splits in half after 20 minutes, so that after 20 minutes there are 2 bacteria, and after 40 minutes there are 4 bacteria. How many bacteria will there be after 2 hours?
A quarter of an hour is 15 minutes, there are 4 x 15 minute in 1 hour.Therefore 5 hours would have 20 x 15 minutes or 20 x quarter hours.
4 hours 20 minutes