Question

Find the sum of 4hours 12 minutes 34 seconds and 12 hours 15 minutes 54 seconds

Answer 1

4hrs+12min+34sec+12hrs+15min+54sec
(4×60min)+12min+34sec+(12×60min)+15min+54sec
(240min+12min+34sec)+(720min+15min)+54sec
(360min+34sec)+(735min+54sec)
(360×60sec+34sec)+(735×60sec+54sec)
21634sec+4464sec
26098sec