Answer: 24,660
Step-by-step explanation:
To figure out how many seconds are in 6 hours and 51 minutes, you must multiply 60 by 60 to figure out how many seconds are in one hour.
60x60 = 3,600 = one hour
Then, multiply 3,600 by 6.
3600x6 = 21,600 = 6 hours
Then, multiply 60 by 51 to figure out the remaining time.
60x51 = 3060 = 51 minutes
Lastly, add 21,600 and 3,060 to get the full time.
21,600 + 3060 = 24,660 = 6 hrs 51min