The speed of a train increases at a consantrate alpha from zero to vand thenremains constant for an interval and finally decreases to zero at a constant rate beta. If l be the total distance described, and the total time then

The speed of a train increases at a consantrate alpha from zero to van

1.	The speed of a train increases at a consantrate alpha from zero to vand thenremains constant for an interval and finally decreases to zero at a constant rate beta. If l be the total distance described, and the total time then
Answer» `t =l/v + v/2 ( 1/alpha + 1/beta)` `t = l/v - v/2 (1/alpha + 1/beta)` `t= l/v - v/2 ( 1/alpha - 1/beta)` `t = l/v + v/2 (1/alpha - 1/beta)` ANSWER :A