Question

1. United Airlines flight A flies 2,000 miles from Minneapolis to New York in 5 hours.United Airlines flight B flies 2,000 miles from Minneapolis to New York in 4 hours. IfUnited flight A starts 1 hour before United flight B, how far ahead of flight B will itbe when flight B has flown 1,500 miles?Answer

Answer 1

We know,

$D=RT$

Where

D is the distance

R is the rate

T is the time

United Airlines Flight A

D = 2000 miles

T = 5 hours

So,

$\begin{gathered} D=RT \\ R=\frac{D}{T} \\ R=\frac{2000}{5} \\ R=400mi\/hr \end{gathered}$

United Airlines Flight B

D = 2000 miles

T = 4 hours

So,

$\begin{gathered} D=RT \\ R=\frac{D}{T} \\ R=\frac{2000}{4} \\ R=500mi\/hr \end{gathered}$

Now,

When Flight B has flown 1500 miles, 1500/500 = 3 hours have passed.

Flight A started 1 hour earlier than Flight B, so 3 + 1 = 4 hours have passed until Flight B has flown 1500 miles.

Thus,

Flight A traveled 400 miles/hr * 4 = 1600 miles in those 4 hours

How far ahead is flight A than flight B????

1600 miles - 1500 miles = 100 miles

Answer100 miles