(Solved): 4. A bus (B) leaves a gas station at an intersection at 1:25PM and travels east at (constant rate o ...

4. A bus $(B)$ leaves a gas station at an intersection at $1:25\mathrm{PM}$ and travels east at (constant rate of) $20\mathrm{km}/\mathrm{h}$. A sports car (C) traveling north at (constant rate of) $60\mathrm{km}/\mathrm{h}$ arrives at the same gas station at 11:25 PM. At what time are the two vehicles closest to each other?