Sam travelled 15 km 52 m by bus, 12 km 265 m by car and the rest 11 km 30 m he walked. How much distance did he travel in all?

Distance travelled by bus = 15 km 52 m = 15.052 km

Distance travelled by car = 12 km 265 m = 12.265 km

Distance travelled on foot = 11 km 30 m = 11.030 km

By adding all,

We get, total distance travelled = 15.052 + 12.265 + 11.030

                                                  = 38.347 km