Explain with steps:- 21. A car increases its speed from 20 km/h to 50 km/h in 10 seconds its acceleration is 1 . 0 . 30 m / s 2 2 . 0 . 18 m / s 2 3 . 083 m / s 2 4 . 0 . 50 m / s 2 Share with your friends Share 0 Sandeep K. Gupta answered this Dear Student, Regards. 1 View Full Answer