Question

A person walks 4 km north, and then walks 8 km west. Approximately, how far away is he from his starting point?

Answer 1

Answer:

I think the person is now 12 km from his starting point.

Answer 2

Answer:

$\sqrt{80}$

Explanation:

$\sqrt{4 ^{2} } + \sqrt{8 {}^{2} } \\ = \sqrt{80 } \:$