How Do You Calculate Time for a Nonstop 190m Elevator Run?

[blinkbubble]

I solved part a of this problem but I'm having trouble figuring out the different steps for part b...could someone break it down clearly?

A certain elevator cab has a total run of 190m and a maximum speed of 305m/min, and it accelerates from rest and then back to rest at 1.22m/s^2
a. how far does the cab move while accelerating to full speed from rest?
b. how long does it take to make the nonstop 190m run, starting and ending at rest?

thanks :)

 

[rootX]

Draw a v-t graph,
you know that v is contant when it reaches 350 m/min

and, what would be the area under graph?

P.S. Is this from Halliday, I solved this two days ago lol