Solve the Problem $175 \mathrm{mph}$ Two Hours Later, a Jet Leaves the Same Airport

Multiple Choice

Solve the problem.
-A private airplane leaves an airport and flies due east at $175 \mathrm{mph}$ . Two hours later, a jet leaves the same airport and flies due east at $315 \mathrm{mph}$ . When will the jet overtake the plane?

A) $4 \frac{1}{2} \mathrm{hr}$
B) $\frac{5}{9} \mathrm{hr}$
C) $1 \frac{4}{5} \mathrm{hr}$
D) $2 \frac{1}{2} \mathrm{hr}$