Answer:
25 hour 40 minutes
Explanation:
3 hrs X 7 is = 21 hours
then you mutliply 40 mins times 7 which is equal to 280mins
the you divide 280mins by 60 mins because 60 minutes is equal to an hour and you come out with 4 hours and 40 minutes which you add to 21 which is equal to 25 hours!
Hope This Helps!