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

Question

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.

Which mode of transport would help one to reach R starting from Q, but without changing the mode of transport?

Accepted Answer

To reach R from Q without changing the mode of transport, we must find a continuous path using a single mode.

1.  Consider the path Q -> P -> R.
    *   Q and P are connected by boat and rail.
    *   P and R are connected by boat only.
    *   If we choose 'boat' from Q to P, we can continue by 'boat' from P to R. This makes 'Boat' a continuous mode of transport from Q to R.

2.  Consider the path Q -> T -> R.
    *   Q and T are connected by air only.
    *   T and R are connected by rail and bus.
    *   There is no direct air connection from T to R, so this path requires changing the mode of transport.

Therefore, the only mode of transport that allows one to reach R starting from Q without changing the mode is Boat (via P).

The final answer is A) Boat.

Answer

Boat

Answer

Rail

Answer

Bus

Answer

Air

Explanation

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