A man completes 30 km of a journey at the speed of 6 km/h and the remaining

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RRB TC CC Exam (Chandigarh) 2008 click here to view all questions

A man completes 30 km of a journey at the speed of 6 km/h and the remaining 40 km of the journey in 5 hr. His average speed for the whole journey is

A7 km/h

B$$6\frac{4}{11}km/h$$

C8 km/h

D7.5 km/h

Nithin K ? Apr 7 '2018 at 15:36

Answer is : 7 km/h

Explanation:

Total distance = 30 + 40 = 70 km 

 

Total time taken =  \(\Large \frac{30}{6}+5=\frac{60}{6} = 10 h\)

Therefore, Required average speed =\(\Large \frac{70}{10} = 7 km/h\)

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Answer is : 7 km/h Explanation: Total distance = 30 + 40 = 70 km    Total time taken =  \(\Large \frac{30}{6}+5=\frac{60}{6} = 10 h\) Therefore, Required average speed =\(\Large \frac{70}{10} = 7 km/h\) Nithin K ? answered Apr 7 '2018 at 15:36 All Comments

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