975
0 hours are in 20 min an hour is 60 min
8 hours, 20 minutes
610 min / 60 = 10.167 hours.
2 hours
5 hours, 50 minutes
60 min = 1 hour so 375 min = 6 hours 15 minutes.
An equality will do here. 260 words/4 min. = X words/15 min. 4X = 3900 X = 975 words ===========
320 min = 51/3 hours = 5hours 20minutes
3 hours
1.95 hours.
2 hours