A robot executes these moves: 30 km South; then 16 km West; then 18 km North; then 7 km East. What is its final bearing from the origin?

Important Notes

• Draw a north arrow before solving and take East as positive x, West as negative x, North as positive y, and South as negative y. |
• Combine opposite movements before calculating distance: cancel East with West and North with South. |
• Decide the final direction from the signs of the remaining horizontal and vertical displacements. For example, positive x and negative y indicate South-East. |
• Keep all distances in one unit and verify the selected option by reconstructing the final coordinates.