Answer:
The speed will be "144 mph".
Step-by-step explanation:
Let the speed of the plane be "x mph".
then,
The car's speed be "x-130 mph".
According to the question,
⇒ [tex]\frac{1440}{x} =\frac{400}{x-130}[/tex]
By applying cross-multiplication, we get
⇒ [tex]1440(x-130)=400x[/tex]
⇒ [tex]1440x-187200=400x[/tex]
⇒ [tex]1440x-140x=187200[/tex]
⇒ [tex]1300x=187200[/tex]
⇒ [tex]x=\frac{187200}{1300}[/tex]
⇒ [tex]=144 \ mph[/tex]
