A man walks 4 km North, then 4 km West, then 4 km South from his starting point. How far and in which direction is he now from the starting point?

Explanation

• Track net displacement: East(+)/West(-) on x-axis, North(+)/South(-) on y-axis
• Net x=-4, net y=0
• Distance = sqrt(x^2+y^2) = 4 km
• Direction = West