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Four cities P, Q, R and S are connected through one-way routes as shown in the figure. The travel time between any two connected cities is one hour. The boxes beside each city name describe the starting time of first train of the day and their frequency of operation. For example, from city P, the first trains of the day start at 8 AM with a frequency of 90 minutes to each of R and S. A person does not spend additional time at any city other than the waiting time for the next connecting train.

Q. If the person starts from R at 7 AM and is required to visit S and return to R, what is the minimum time required?
  • a)
    6 hours 30 minutes
  • b)
    3 hours 45 minutes
  • c)
    4 hours 30 minutes
  • d)
    5 hours 15 minutes
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Four cities P, Q, R and S are connected through one-way routes as show...

Travel time between two city is 1 hr.
Hence, the total Journey time R to Q = 1 hr
Wait at Q = 1 hr Q to P = 1 hr
Wait at P = 1 hr P to S = 1 hr
Wait at S = 30 min
S to R = 1 hr
Total Journey hours from R to R is 6 hr 30 m.
Hence, the correct option is (A).
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Four cities P, Q, R and S are connected through one-way routes as shown in the figure. The travel time between any two connected cities is one hour. The boxes beside each city name describe the starting time of first train of the day and their frequency of operation. For example, from city P, the first trains of the day start at 8 AM with a frequency of 90 minutes to each of R and S. A person does not spend additional time at any city other than the waiting time for the next connecting train.Q. If the person starts from R at 7 AM and is required to visit S and return to R, what is the minimum time required?a)6 hours 30 minutesb)3 hours 45 minutesc)4 hours 30 minutesd)5 hours 15 minutesCorrect answer is option 'A'. Can you explain this answer?
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Four cities P, Q, R and S are connected through one-way routes as shown in the figure. The travel time between any two connected cities is one hour. The boxes beside each city name describe the starting time of first train of the day and their frequency of operation. For example, from city P, the first trains of the day start at 8 AM with a frequency of 90 minutes to each of R and S. A person does not spend additional time at any city other than the waiting time for the next connecting train.Q. If the person starts from R at 7 AM and is required to visit S and return to R, what is the minimum time required?a)6 hours 30 minutesb)3 hours 45 minutesc)4 hours 30 minutesd)5 hours 15 minutesCorrect answer is option 'A'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Four cities P, Q, R and S are connected through one-way routes as shown in the figure. The travel time between any two connected cities is one hour. The boxes beside each city name describe the starting time of first train of the day and their frequency of operation. For example, from city P, the first trains of the day start at 8 AM with a frequency of 90 minutes to each of R and S. A person does not spend additional time at any city other than the waiting time for the next connecting train.Q. If the person starts from R at 7 AM and is required to visit S and return to R, what is the minimum time required?a)6 hours 30 minutesb)3 hours 45 minutesc)4 hours 30 minutesd)5 hours 15 minutesCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Four cities P, Q, R and S are connected through one-way routes as shown in the figure. The travel time between any two connected cities is one hour. The boxes beside each city name describe the starting time of first train of the day and their frequency of operation. For example, from city P, the first trains of the day start at 8 AM with a frequency of 90 minutes to each of R and S. A person does not spend additional time at any city other than the waiting time for the next connecting train.Q. If the person starts from R at 7 AM and is required to visit S and return to R, what is the minimum time required?a)6 hours 30 minutesb)3 hours 45 minutesc)4 hours 30 minutesd)5 hours 15 minutesCorrect answer is option 'A'. Can you explain this answer?.
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