A) \[\frac{5}{4}\,\,km\]
B) \[\frac{7}{4}\,\,km\]
C) \[\frac{9}{4}\,\,km\]
D) \[\frac{11}{4}\,\,km\]
Correct Answer: B
Solution :
Clearly there is a difference between both the time is 12 minute. \[\therefore \] \[\frac{x}{2.5}-\frac{x}{3.5}=\frac{12}{60}\] \[\Rightarrow \] \[\frac{20x}{175}=\frac{12}{60}\] \[x=\frac{175\times 12}{20\times 60}=\frac{7}{4}\,\,km\]You need to login to perform this action.
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