An airplane flies with a constant speed of 1008km/h. how far can it travel in 4 hours 20 minutes

For this question you can use a very useful formula that is common to both physics, mathematics, and other areas.

This formula is d = v/t
where d = distance
v = velocity
and t = time

We are given v and t, so we plug it into the formula.
However, first we should convert 4 hours 20 minutes to a value with a decimal. As there are 60 minutes in an hour, 20 minutes is 1/3 of an hour or 0.333.
Therefore, 4 hours 20 minutes can be approximately stated as 4.333 hours.

d = v/t = 1008/4.333 = 232.633 kilometeres.

Hope this helped!