Answer:
I didn't understand the question well is it 1.8meter in 1h24m if so then here is my answer
Explanation:
so basically to make things easy for me I convert hours to minutes 4h is 4×60=240minutes 1h24min= 84min right
so if I baby walks 1.8m in a 84min then in a 240min they gonna walk X meter
84min-->1.8m
240min--> X
so 240×1.8÷84=5.14
So a baby will walk 5.14m in 4H