ANSWER:
66666.67 km/hr
STEP-BY-STEP EXPLANATION:
Given:
Distance (d) = 100000 km
Time (t) = 1.5 hr
We can calculate the speed knowing that it is the quotient between the distance and the time, just like this:
[tex]\begin{gathered} v=\frac{d}{t} \\ \text{ we replacing} \\ v=\frac{100000}{1.5} \\ v=66666.67\frac{km}{hrs} \end{gathered}[/tex]The velocity of the plane is 66666.67 kilometers per hour