Question

a boy rides a bicycle from a to b and back and cover the distance of 180 metre in 3 minutes find the average speed and average velocity​

Answer 1

1 meter per second (1m/s) as 3min =180 sec

Answer 2

Avg Velocity = Total Distance / Total Time

and  before filling the values check the UNITS

as SI UNIT of Velocity is Meter per Second

so Time should be in Seconds (SI Unit) and Distance should be also in Meters (SI unit)

Distance = 180meters

Time=3min=3×60=180seconds

Now,

Avg Velocity = 180/180 = 1 meter per second