Explanation:

- Rehana starts at her home.

- She drives 6 km west.

- Turns left and drives 3 km south.

- Turns left again and drives 10 km east.

- Rehana ends up 4 km east of her starting point.

- To find the shortest distance:

- Imagine a straight line from the home (starting point) to the ending point.

- This is the direct path needed.

- Use the Pythagorean theorem:

- Horizontal distance = 4 km

- Vertical distance = 3 km

- Shortest distance = \(\sqrt{(4^2 + 3^2)}\) = 5 km

- Option:4- 5 km is correct.