a tran travelling at 20m/s under gas a uniform retardation of 2m/s. when brakes are applied calculate the time take to come to rest and the distance travelied form the place when the brakes were applied
you could use some proofreading, or better dictation software (or speak more clearly) ...
v = v0 + at, so
20 - 2t = 0
use that t to find s = vt + 1/2 at^2
s = 20t - 2/2 t^2 = ___