Velocity = displacement/time
1.6 = 253/t
t = 158.125
It takes them about 158 seconds
A scalar is a quantity that is fully described by a magnitude only. It is described by just a single number. Some examples of scalar quantities include speed, volume, mass, temperature, power, energy, and time. A vector is a quantity that has both a magnitude and a direction.
I hope this helps you.
I believe it’s all of the questions