Distance travelled by Mohan by Auto = 5 km 250 m
Distance travelled by him by Bus = 6 km 350 m
Distance travelled by him by Car = 10 km 470 m
Total distance
= 5 km 250 m + 6 km 350 m +10 km 220 m
= (5 + 6 + 10) km + (250 + 350 + 220 ) m
= 21 km 870 m
So, the total disatnce travelled by him = 21 km 870 m