Question

jose buys a new moed he travel 3 km south and then 4 km east how far does he need to go to get back to where he started

Answer 1

using Pythagoras theorem,
$a {}^{2} = b {}^{2} + c {}^{2}$
$a {}^{2} = 3 {}^{2} + 4 {}^{2}$
$a {}^{2} = 9 + 16 = 25$
$a = \sqrt{25 } = 5$
a=5
he need to travel 5km

Answer 2

Given:
Distance travelled towards south=3km
Distance travelled towards east= 4km

To find: how much he needs to travel to return to the destination point.

Solution:
Displacement is the shortest distance between source and destination.

By Pythagoras Theorem:
C^2= a^2 +b^2
=3^2 + 4^2
=9+16
=25
C = 5km
So, the person needs to travel 5km to reach the destination point.