1460
1360
9
540/4 = 132.5 hours
420 = 400 + 20 others are 310 = 400 - 90 530 = 400 +130 460 = 400 + 60 370 = 400 - 30 so as 20 is smallest the answer is 420
5 hours 30 minutes.
530 minutes is 8 hours, 50 minutes.
7.75 hours
This is equivalent to 16 hours.
1460
1360
9
Ten hours.
This is equivalent to 16 hours.
4.5
9 hours, 45 minutes
10 and a half hours