A train accelerates from 30 km per hr to 45 km per hr in 15 seconds Find its acceleration and distance?

By kmh you probably mean km/h. If so, (40-35)km/h=(45-40)km/h=(50-45)km/h=5km/h is the change in velocity each second and (5km/h)= (5km/h)(1h/3600s)=0.0013888889km/s=(0.00138km/s)(1000m/km)=about 1.38m/s and the acceleration is the change in velocity divided by the change in time. The acceleration is then a=(1.38m/s)/1s=about 1.38m/s2.