The correct option is A Mahesh
Let us take each one of them.
(a) Mahesh's Working time
= 9:15 to 6:30
= 9:15 to 18:30
= 9 hours 15 minutes (18 - 9 = 9 and 30 - 15 = 15)
Actual work done excluding break
= 9 hours 15 minutes - 24 minutes
24 can be written as 15 + 9
= 9 hours 15 minutes - 15 minutes - 15 minutes
= 9 hours - 9 minutes
= 8 hours 51 minutes
(b) Shivansh - Working time
= 9:30 to 6:15
= 9:30 to 18:15
Since minutes in the second time is lesser than the minutes in the first time,we will first calculate
17:30 - 9:30 = 8 hours
17:30 + 30 = 18:00
18:00 + 15 = 18:15
= 8 hours + 30 minutes + 15 minutes
= 8 hours 45 minutes
Actual work done
= 8 hours 45 minutes - 21 minutes
= 8 hours 24 minutes
(c) Ganesh - Working time
= 9:45 to 6:30
= 9:45 to 18:30
Since minutes in the second time is lesser than the minutes in the first time,we will first calculate
17:45 - 9:45 = 8 hours
17:45 + 15 = 18:00
18:00 + 30 = 18:30
= 8 hours + 30 minutes + 15 minutes
= 8 hours 45 minutes
Actual work done
= 8 hours 45 minutes - 22 minutes
= 8 hours 23 minutes
Hence, Mahesh worked the most.