Find focal length of a concave mirror having 40 cm radius of curvature​

Which of the following statement is false

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?

Avehicle accelerates from 0 to 30 m/s in 10 seconds on a straight road