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Five cities P, Q, R, S and T are connected by different modes of transport as follows: P and Q are connected by boat as well as rail.
Sand R are connected by bus and boat.
Q and T are connected by air only.
P and R are connected by boat only.
T and R are connected by rail and bus.
Sand R are connected by bus and boat.
Q and T are connected by air only.
P and R are connected by boat only.
T and R are connected by rail and bus.
Q.If a person visits each of the places starting from P and gets back to P, which of the following places must he visit twice?
- a)Q
- b)R
- c)S
- d)T
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Five cities P, Q, R, S and T are connected by different modes of trans...
Because the node at R leads to S from where there is no other way. So, one has to return to R in any possible way.
Most Upvoted Answer
Five cities P, Q, R, S and T are connected by different modes of trans...
Explanation:
To determine which place the person must visit twice, we need to analyze the given modes of transport and connections between the cities.
Given connections:
- P and Q are connected by boat and rail.
- R and S are connected by bus and boat.
- Q and T are connected by air only.
- P and R are connected by boat only.
- T and R are connected by rail and bus.
Analysis:
To visit each place starting from P and getting back to P, the person must have a way to travel between each pair of cities and return to P. Let's analyze each city and its connections:
1. P:
- Connected to Q by boat and rail.
- Connected to R by boat only.
- Must visit Q and R.
2. Q:
- Connected to P by boat and rail.
- Connected to T by air only.
- Must visit P and T.
3. R:
- Connected to P by boat only.
- Connected to S by bus and boat.
- Connected to T by rail and bus.
- Must visit P, S, and T.
4. S:
- Connected to R by bus and boat.
- No other direct connections mentioned.
- Must visit R.
5. T:
- Connected to Q by air only.
- Connected to R by rail and bus.
- No other connections mentioned.
- Must visit Q and R.
Conclusion:
Based on the analysis, the person must visit the following cities twice in order to visit each place starting from P and getting back to P:
- Q: Must visit Q when traveling from P to T and again when traveling from T back to P.
- R: Must visit R when traveling from P to S and again when traveling from S to T.
Therefore, the correct answer is option B) R.
To determine which place the person must visit twice, we need to analyze the given modes of transport and connections between the cities.
Given connections:
- P and Q are connected by boat and rail.
- R and S are connected by bus and boat.
- Q and T are connected by air only.
- P and R are connected by boat only.
- T and R are connected by rail and bus.
Analysis:
To visit each place starting from P and getting back to P, the person must have a way to travel between each pair of cities and return to P. Let's analyze each city and its connections:
1. P:
- Connected to Q by boat and rail.
- Connected to R by boat only.
- Must visit Q and R.
2. Q:
- Connected to P by boat and rail.
- Connected to T by air only.
- Must visit P and T.
3. R:
- Connected to P by boat only.
- Connected to S by bus and boat.
- Connected to T by rail and bus.
- Must visit P, S, and T.
4. S:
- Connected to R by bus and boat.
- No other direct connections mentioned.
- Must visit R.
5. T:
- Connected to Q by air only.
- Connected to R by rail and bus.
- No other connections mentioned.
- Must visit Q and R.
Conclusion:
Based on the analysis, the person must visit the following cities twice in order to visit each place starting from P and getting back to P:
- Q: Must visit Q when traveling from P to T and again when traveling from T back to P.
- R: Must visit R when traveling from P to S and again when traveling from S to T.
Therefore, the correct answer is option B) R.
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Five cities P, Q, R, S and T are connected by different modes of transport as follows: P and Q are connected by boat as well as rail.Sand R are connected by bus and boat.Q and T are connected by air only.P and R are connected by boat only.T and R are connected by rail and bus.Q.If a person visits each of the places starting from P and gets back to P, which of the following places must he visit twice?a)Qb)Rc)Sd)TCorrect answer is option 'B'. Can you explain this answer?
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