At time $t = 0$, cars X and Y are located as illustrated. Both are moving in the same direction. X is $50\,\text{m}$ behind Y and moves with a constant velocity of $30\,\text{m s}^{-1}$. Y moves with a constant velocity of $20\,\text{m s}^{-1}$. What is the value of $t$ when X is level with Y?
- A$1.0\,\text{s}$
- B$1.7\,\text{s}$
- C$2.5\,\text{s}$
- D$5.0\,\text{s}$