recategorized by
780 views
1 votes
1 votes

Five cities P, Q, R, S, T are connected by different modes of transport as follows:

  • P and Q connected by boat as well as rail.
  • S and R connected by bus and boat.
  • Q and  T connected by air only.
  • P and  R connected by boat only.
  • T and R connected by rail and bus.

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?

  1. P
  2. Q
  3. R
  4. T
recategorized by

1 Answer

0 votes
0 votes
From the information given, we find that the cities P, Q, R, S, T  are connected as follows:
$\begin{array}{lcr} P \Leftarrow & \Rightarrow R \Leftarrow & \Rightarrow S \\ \Uparrow & \Uparrow  & \\ \Downarrow & \Downarrow & \\ Q \Leftarrow & \Rightarrow T & \end{array}$
To go to S back to P, R must be visited twice.
Answer:

Related questions

1 votes
1 votes
1 answer
3
1 votes
1 votes
1 answer
4
Applied Course asked Jan 16, 2019
548 views
As traffic congestion plagues every significant road, similarly it also _______ the narrow lanes of the city.clogsobliteratesrestrictsprevents