Answer:
2 hrs
Step-by-step explanation:
The formula for speed is given as:
[tex]v=\frac{d}{t}\\\\t=vd[/tex]
Let X be the speed of plane B. Given that the time to cover there respective distance is equal, we can equate as below:
[tex]Time=\frac{Distance }{Speed}\\\\\frac{750}{x}=\frac{900}{x+75}\\\\750(x+75)=900x\\\\\\x=375\ mph[/tex]
Plane A's time is therefore calculated as:
[tex]Time=\frac{Distance}{Speed}\\\\=\frac{750}{375}\\\\=2\ hrs[/tex]
Hence, it takes A 2 hrs to travel 750 miles.
