Answer:
The distance (d) between the two boys can be found using the Pythagorean theorem given by:
[tex]d = \sqrt{x^2 + y^2}[/tex]
where (x) is the horizontal distance and (y) is the vertical distance.
Plugging in the values:
[tex]x = 1.2 \text{ km}, \quad y = 0.5 \text{ km}[/tex]
[tex]d = \sqrt{(1.2)^2 + (0.5)^2}[/tex]
[tex]d = \sqrt{1.44 + 0.25}[/tex]
[tex]d = \sqrt{1.69}[/tex]
d = 1.3 km
