[" A car accelerates from rest at a constant rate "alpha" for sometime and reaches a maximum velocity.Then "],[" it decelerates at a constant rate "beta" to come to rest.If the total time lapsed is 't',then the maximum "],[" velocity acquired by the car will be "],[[" a) "(alpha+beta)/(alpha beta)t," b) "(alpha beta)/(alpha+beta)t," c) "(alpha beta)/(alpha^(2)+beta^(2))t," d) "(alpha^(2)+beta^(2))/(alpha beta)t]]