A) 6.5 hours
B) 7.2 hours
C) 3.2 hours
D) 4.7 hours
E) 5 hours
Correct Answer: E
Solution :
Ratio of speed = 5 : 9 \[\therefore \]Ratio of time = 9 : 5 Now, 9\[-\]5 = 240 min \[\therefore \]\[5\equiv 300\]min = 5 hrYou need to login to perform this action.
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