Two cars are travelling towards each other at speed of 20 m s^-1 each. When the cars are 300 m apart, both the drivers apply brakes and the cars…

Two cars are travelling towards each other at speed of $\displaystyle 20 \mathrm{~m} \mathrm{~s}^{-1}$ each. When the cars are $\displaystyle 300$ m apart, both the drivers apply brakes and the cars retard at the rate of $\displaystyle 2 \mathrm{~m} \mathrm{~s}^{-2}$. The distance between them when they come to rest is :