| Duration (in hour) | 0-6 | 6-8 | 8-16 | 16-20 |
| Distance covered (in km) | 400 | 0 | 600 | 200 |
A) \[75\text{ }km\text{ }{{h}^{-1}}\]
B) \[~50\text{ }km\text{ }{{h}^{-1}}\]
C) \[60\text{ }km\text{ }{{h}^{-1}}\]
D) \[~66.67\text{ }km\text{ }{{h}^{-1}}\]
Correct Answer: C
Solution :
\[\text{Average}\,\text{speed=}\frac{\text{Distane covered}}{\text{Time}\,\text{taken}}\] \[\text{=}\frac{400+600+200}{20}=\frac{1200}{20}=60\,km\,{{h}^{-1}}\]
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