Question

A man ghost 3 kilometre north and then 4 km East how far is he away from his initial position

Answer 1

When he reaches his final position, a right angled triangle is formed.
Let the distance from his initial position and final position be x kilometers.
${x}^{2} = {3}^{2} + {4}^{2}$
${x}^{2} = 9 + 16$
${x}^{2} = 25$
$x = 5$

therefore, the distance between his initial and final position is 5 kms