A) \[6\frac{4}{11}km/h\]
B) \[7\,km/h\]
C) \[7\frac{1}{2}km/h\]
D) \[8\,km/h\]
Correct Answer: B
Solution :
[b] Total distance \[=(30+40)\,km=70\,km\] Total time taken \[=\left( \frac{30}{6}+5 \right)\,h\] Average speed \[=\frac{70}{10}km/h=7km/h\] |
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