A car travelling at 108 km h^(-1) has it...

A car travelling at `108 km h^(-1)` has its speed reduced to `36 km h^(-1)` after travelling a distance of `2000 m` Find the retardation (assumed uniform) and time taken for this process.

`"2 m/s"^2` , 10 sec

`-2 "m/s"^2` 10 sec

`4 "m/s"^2` , 5 sec

`"4 m/s"^2` , 10 sec

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