A train travels 50 km. distance with speed 50 km./hrs and next 50 km. with speed 60 km./hrs. Average

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16 Apr 2021 Train & Speed

A train travels 50 km. distance with speed 50 km./hrs and next 50 km. with speed 60 km./hrs. Average speed will be

OPtion

1) 52
2) 50
3) 60
4) 54
5) 55
6) 54.54
7) 55.5
8) 110
9) 27.27
10) None of the above

Solution

Total distance travelled = 100 km.
Total time taken = (50/50) + (50/60) hrs = 11/6 hrs
so average speed = 100/(11/6) = 600/11 = 54.54

Correct Option: 6 Best Solution (3)