A) \[60\text{ }km\text{ }{{h}^{-1}}\]
B) \[40\text{ }km\text{ }{{h}^{-1}}\]
C) \[~72\text{ }km\text{ }{{h}^{-1}}\]
D) \[20\text{ }km\text{ }{{h}^{-1}}\]
Correct Answer: C
Solution :
\[1\,km\,{{h}^{-1}}=\frac{5}{18}m\,{{s}^{-1}}\] \[?=20\,m\,{{s}^{-1}}\] \[\frac{20}{5}\times 18=72\,\,km\,{{h}^{-1}}\]You need to login to perform this action.
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