Explanation:

Alright, let’s break this down step by step:

- U @ Q: U is either 2 or 12 km west of Q.

- U $ T: U is either 5 or 9 km north of T.

- T # S: T is either 2 or 12 km east of S.

- R # T: R is either 2 or 12 km east of T.

Now, since we want S and R, here’s what’s up:

- Start with S:

S —(2 or 12 km east)—> T

T —(2 or 12 km east)—> R

So S to R (along east-west) = (T to S) + (T to R)

You want the possible sums:

- 2+2 = 4

- 2+12 = 14

- 12+2 = 14

- 12+12 = 24

The possible distances are 4, 14, and 24 km.

Option 4 (16 km) does not appear in our sums, so that's your answer.

Let’s match it up with your picks:

- 14? (possible)

- 24? (possible)

- 4? (possible)

- 16? (not possible)

- “None of these”? Wrong—a distance actually isn’t possible.

Correct answer:

Option 4: 16