A) 6 hrs 30 minutes
B) 6 hrs 21 minutes
C) 6 hrs 27 minutes
D) 6 hrs 40 minutes
Correct Answer: B
Solution :
Required take time \[=\frac{600}{100}hours+\left( \frac{600}{75}-1 \right)\times 3\,\,\min \] \[=6\,\,hour.+7\times 3\,\,min\]
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