Haripriya is expected to reach station S late. What is the latest time by which she must be ready to board at station S if she must reach station B before 1 am via station R?
Started 3 months ago by Shashank in
Explanatory Answer
Travelling time between S and R = ( 10 × 2 ) + ( 9 × 1 ) = 29 (10×2)+(9×1)=29 minutes There is a stoppage of 2 minutes at R Travelling time between R and B = ( 7 × 3 ) + ( 1 × 2 ) + ( 5 × 1)=28 minutes In the north-south direction, the first train from A arrives at R at time = 6 am + ( 3 × 3 ) + ( 2 × 1 ) (3×3)+(2×1) = 6:11 am. Since R is a junction so this train will halt for 2 minuteat R and leave at 6:13. Every 15 minutes, a train starts from A in the north-south direction. The last train that leaves A will be at 12:00 am and it will leave R at 12:13 am, so Haripriya must reach R till 12:13 am. Travelling time between S and R = ( 10 × 2 ) + ( 9 × 1 ) = 29 (10×2)+(9×1)=29
minutes So Haripriya must board the train at S by 11:44 pm In the east-west direction, the first train from N arrives at S at time = 6 am + ( 6 × 2 ) + ( 5 × 1 ) (6×2)+(5×1) = 6:17 am. Since S is a junction so this train will halt for 2 minutes at S and leave at 6:19. Every 10 minutes, a train starts from N in the east-west direction.
Therefore, Haripriya should board the train which leaves S at 11:39
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