Question

7 hours 12 secs - 3 hours 42 secs substract it​

Answer 1

Answer:

so

1 hour=3600sec

7 hour=25200 sec

25200 +12=25212

3 hours= 10800sec

subtraction= 25200-10800

14,400 sec

and in hour

4 hour

Answer 2

Answer:

g

Step-by-step explanation:

7hours in seconds +12=25200+12=25212

3 hours in seconds +42=10800+45=10842

25212-10842=14370sec.

=3hours ,59 minutes, 30 seconds