A sprinter takes part in a $100\,\text{m}$ race. Starting from rest, the sprinter accelerates uniformly at $2.5\,\text{m s}^{-2}$ until the speed reaches $10\,\text{m s}^{-1}$. After that, the speed stays constant right up to the finish. How long does the sprinter take to complete the race?
- A$8.9\,\text{s}$
- B$10\,\text{s}$
- C$12\,\text{s}$
- D$14\,\text{s}$