Question

Jose buys a new moped. He travels 3 km south and 4km east. How far does he need to go to get back where he started?

Answer 1

He need to travel 5km
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Answer 2

South and east directions are perpendicular to each other

If he want to go back with Shortest Distance then
By Pythagoras theorem
S = √(3² + 4²) km = 5 km

He should travel minimum 5 km to go back to his initial position.