3) George walks away from his house. He walks 25 km west and then

15 km south. How far is he from his house? Those

29.15 km

Step-by-step explanation:

Given;

George walks; 25km west and then 15 km south

Resolving the directions to x and y axis;

North and South represent positive and negative y axis.

East and West represent positive and negative x axis respectively.

25km west

Rx = - 25 km

15 km south

Ry = - 15 km

The resultant displacement from the house is;

R = √ (Rx^2 + Ry^2)

Substituting the values;

R = √ ((-15) ^2 + (-25) ^2)

R = √ (225+625)

R = √ (850)

R = 29.15 km

Therefore, he is 29.15 km from house