A bus decreases its speed from 80km/h to 60km/h in 5s. Find the acceleration of the bus.

In the above question, is it necessary to convert km/h to m/s??

Experts please reply fast!!!!!!!

Initial Velocity (u)=80km/h i.e. 22.22m/s
Final Velocity(v)=60km/h i.e. 16.667m/s
Time (t) =5 sec.
Acceleration (a) = (v - u )/t
=(16.667 - 22.22)?5
=-5.553 ?5
=-1.1106m/sec^2(approx)

This is the answer of your question