Want this question answered?
Be notified when an answer is posted
Chat with our AI personalities
30 minutes
Starting at 4:05, wind the clock back 35 minutes, you arrive at 3:30, now wind the clock back the remaining 1 hour to get 2:30.
If that's 0.5, half of 30 minutes is 15 minutes.
4 minutes 30 seconds
It is: (4*60)+30 = 270 minutes