A cyclist goes 4 km north, then 3 km east, then 4 km south. How far is he from his starting point? MCQ with Answer and Explanation

Explanation:
From house (0,0), she goes 50m South to (0,-50), left (East) 20m to (20,-50), North 30m to (20,-20). To walk back to her house at (0,0) from (20,-20), she must travel horizontally West and vertically North, resulting in a North-West direction.

Explanation:
Net 5 m east.

Explanation:
West 5, left (south) 5, left (east) 5 -> net south 5, west 0? Wait: west 5, then south 5, then east 5 => east-west cancel, net south 5. So south. Not an option. I'll adjust: West 5, left (south) 5, left (east) 5 -> net south 5, east 0 => south. Option not there. Change: West 5, left (south) 5, right (west) 5 -> net west 10, south 5 -> South-west. I'll set: Woman walks 5 m west, turns left walks 5 m, turns right walks 5 m. Then net west 10, south 5 -> South-west.