On the basis of the information given in the following case.
Tina a blast furnace expert, who works as a technology trouble-shooter stays in Jamshedpur. She has got an important assignment in Delhi, which requires six hours to complete. The work is so critical that she has to start working the moment she reaches the client’s premises. She is considering various options for her onward and return journey between Jamshedpur to Delhi.A quick search revealed that ticket from Jamshedpur to Delhi is available in two trains. Trains 12801 and 12443 depart from Jamshedpur station at 06:45 hrs and 15.55 hrs and reach Delhi next day at 04:50 hrs and 10:35 hrs respectively. Trains 12444 and 12802 start from Delhi at 17:20 hrs and 22:20 hrs and reach Jamshedpur next day at 10:35 hrs and 20:05 hrs respectively. Another option is to reach Ranchi by a three hour road trip and take a flight to Delhi from Ranchi. The distance between Ranchi and Delhi is covered in 105 minutes both-ways by any of the scheduled flights. Air India operates two flights, AI 9810 and AI 810, which depart Ranchi at 8:00 hrs and 15:25 hrs respectively. Flight number IT-3348 operated by Kingfisher Airlines departs Ranchi at 19:20 hrs. Return flights operated by Air India, AI 9809 and AI 809, depart Delhi at 5:50 hrs and 11:00 hrs respectively. Flight number IT-3347 operated by Kingfisher Airlines departs Delhi at 17:10 hrs.From Tina’s home Jamshedpur railway station is five minutes drive, and her destination at Delhi is 90 minutes and 30 minutes drive from airport and railway station respectively. One has to reach the airport at least one hour before the scheduled departure to complete the boarding procedure. At every railway station she loses five minutes in navigating through the crowd.
Tina gets a message that her work has to be completed between 9:00 hrs. and 17:00 hrs. If
she wants minimize the total time out of Jamshedpur, the best option, from the options given below, for her among the following is to go by
S - Source station D - Destination Station
Option (A):
The start of TIna will be at 15:55.
She will reach Delhi at 10:35
She can depart from Delhi (RS) earliest by = 10:35 + 00:30(Station to Work) + 0:05(Wait time) + 6:00(Work time) + 00:30(Work to station) = 17:40
The next train will get her to Jamshedpur on the 12th at 10:35
Tina will be out of Jamshedpur from 15:55 to 10-35(3rd Day), i.e. 66 hrs. 40 min.
Option (B):
The start of TIna will be at 06:45.
She will reach Delhi at 04:50
She can depart from Delhi (RS) earliest by = 04:50 + 00:30(Station to Work) + 0:05(Wait time) + = 5:25
The work will start at 9:00 hrs, and she will finish by 15:00 hrs. By train 12802, she would reach Jamshedpur on 20:05 hrs (3rd Day).
She is out of Jamshedpur for 61 hrs., 20 min.
Option (C):
As train AI9810 departs from Ranchi at 8:00 hrs. She has to reach the airport at 7:00 hrs, and so she has to start from Jamshedpur at 4:00 hrs. The Flight reached Delhi at 9:45 am, and she would reach the client's place at 11:45 am. As she has to finish the work by 17:00 hrs., she would have to wait till the next day and finish it by 15:00 hrs. She could catch the Flight only on day 3, and she would reach Ranchi at 7:35 hrs and reach Jamshedpur at 10:35 hrs.
She is out of Jamshedpur for 54 hrs 35 min.
Option (D):
As AI810 departs from Ranchi at 15:25 hrs, she has to be at the airport at 14:25 hrs and leave Jamshedpur at 11:25 hrs. She reaches Delhi and would be able to work on the project from 9:00 hrs to 15:00 hrs on day 2. She can catch the Flight only on day 3 and would reach Ranchi at 7:35 hrs and can reach Jamshedpur at 10:35 hrs on Jan 11th.
She was out of Jamshedpur for 47 hrs 10 minutes.
Option (E):
Similar to option C, this approach will also take 54 hrs 35 min.
SInce option D approach takes the least time; the correct option is D.
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