A) \[11.88\,m\,{{s}^{-1}}\]
B) \[15.4\,m\,{{s}^{-1}}\]
C) \[8.41\text{ }m\text{ }{{s}^{-1}}\]
D) \[5.83\text{ }m\text{ }{{s}^{-1}}\]
Correct Answer: A
Solution :
Average speed \[\text{=}\frac{\text{Total}\,\text{distance}\,\text{travelled}}{\text{Toital}\,\text{time}\,\text{taken}}\] Total distance = 150 km Total time taken = 3.5 hour \[\therefore \]Average speed \[=\frac{150}{3.5}=42.8\,km\,{{h}^{-1}}\] Average speed is \[m\,{{s}^{-1}}\] \[=\frac{42.8\times 1000}{60\times 60}=11.88\,m\,{{s}^{-1}}\]You need to login to perform this action.
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