A) 210 km
B) 205 km
C) 209 km
D) 200 km
Correct Answer: A
Solution :
[a] Let Length of Journey = x km. According to question, \[\frac{x}{40}-\,\frac{x}{42}=\frac{15}{60}\] \[\frac{21x-\,20x}{840}=\frac{1}{4}\] \[x=\frac{840}{4}=210\,\,km\] \[\therefore \]Length of Journey is = 210 kmYou need to login to perform this action.
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