The speed of the airplane is 400 miles per hour.
What is the formula of speed ?
The formula of speed is, [tex]v=\frac{s}{t}[/tex]
where v is the speed, s is the travelled distance and t is the time interval in which the distance travelled.
What is the required speed ?
Given that, the airplane travels 520 miles in 1.3 hours.
So, Distance(s) = 520 miles & Time(t) = 1.3 hours
∴ Speed, [tex]v=\frac{s}{t}[/tex]
⇒ v = [tex]\frac{520}{1.3}[/tex] = 400
So, Speed = 400 miles/hour
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