Question
A man completes 30 km of a journey at the speed of 6 km/hr and the remaining 40 km of the journey in 5 hours. His average speed for the whole journey is
Answer: Option C
Answer: (c)Time taken to cover 30km at 6 kmph= $30/6$ = 5 hoursTime taken to cover 40 km = 5 hoursAverage speed= $\text"Total distance"/ \text"Total time"$= ${30 + 40}/10 = 70/10 = 7$ kmph
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Answer: (c)Time taken to cover 30km at 6 kmph= $30/6$ = 5 hoursTime taken to cover 40 km = 5 hoursAverage speed= $\text"Total distance"/ \text"Total time"$= ${30 + 40}/10 = 70/10 = 7$ kmph
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