A) 4hrs 20 min
B) 5hrs 20 min
C) 5hrs
D) 6hrs
Correct Answer: C
Solution :
Time taken to travel \[50\,km=\frac{50}{12.5}\,hrs\,=4\,hrs\]. Number of stoppages \[=\frac{50}{12.5}-1=3\] \[\therefore \] Total duration of stoppages \[=(3\times 20)\] min = 60 min = 1 hrs. \[\therefore \] Total time to complete the whole distance = 5 hrs.
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