Question

Q (04) Add: 18 hours 5 minutes 30 seconds and 7 hours 35 minutes 40 seconds.

(05) Subtract:- 12 hours 35 minutes 15 seconds from 30 hours 40 minutes 30 seconds. ​

Answer 1

Step-by-step explanation:

q4) on adding 18hrs 40 min 70 sec

on properly rearranging with limit

result=18hrs 41 min 10 sec

q5) on sub 18 hrs5 min 15 sec