a car accelerates from 25 km/hr in 30 seconds. what Is the acceleration?

25 km/hr = 6,9 m/sacceleration = 6,9 / 30 = 0,23acceleration = 0,23 m / s²

acceleration is units of distance per time squared, take speed divided by time:(25 km/hr)/(30 sec) = 0.833 km/hr/secthese units aren't very helpful, so convert to units more likely to represent what your measuring. probably meters per seconds squared:(0.833 km/hr/sec)*(1 hr/ 3600sec)*(1000m/km) = 0.23 m/s^2