Let the total journey time taken by Amal be 3 t hours. Therefore, the total distance =10t+20t+30t=60tkms Bimal took each mode of transport 1/3 of the total distance. Therefore, total time taken by him =
20t
10
+
20t
20
+
20t
30
=
11t
3
hours The percentage by which Bimal's travel time exceeds Amal's travel time (