1. A car travels along a horizontal road and passes a point $A$ with velocity $17.2{ms}^{-1}$ and constant acceleration $0.4{ms}^{-2}$.

Point $B$ is $0.8km$ from point $A$. When the car reaches point $B$ it starts decelerating at a constant rate of $2.75m{s}^{-2}$ until it comes to rest at point $C$.

Find the time taken by the car to travel from point $A$ to point $C$.

Give your answer to one decimal place.