Based on the calculations, the distance covered by Lea is equal to 336 kilometers.
Given the following data:
Mathematically, speed is given by this formula;
[tex]Speed = \frac{distance}{time}[/tex]
Next, we would calculate Hanna's speed by using the above formula:
[tex]Hanna's\; speed = \frac{252}{3}[/tex]
Hanna's speed = 84 km/h.
For Lea's distance:
[tex]Distance = speed \times time\\\\Distance = 84 \times 4[/tex]
Distance = 336 kilometers.
Read more on speed here: brainly.com/question/10545161