Question

a bus starts from rest and then moves with a constant acceleration of 2 m/s square calculate its time of travel if its final velocity is 20m/s

Answer 1

u=0
v=20 m/s
a= 2 m/s²
we know v=u+at
putting the values
20=0+2×t
20=2×t
t=10

Answer 2

Use equation of motion
v = u + at

t = (v - u) / a
= [(20 - 0) m/s] / 2 m/s²
= 10 seconds

Time of travel is 10 seconds