Question

A car travels 20 meters east in 1.0 second. the displacement of the car at the end of this 1.0 second interval is

Answer 1

Displacement is the word we use for the distance covered so in this case when a car travels 20 meter east in 1 second, at the end of that 1 second interval a car travels a distance of 20 meter.
And the distance covered is the displacement, so it means that displacement of the car after 1 second is 20 meter east.