Two boats A and B start towards each other from two places, 108 km apart. Speed of the boats A and B in still water are 12 km/h and 15 km/h respectively. If A proceeds down and B up the stream, they will meet after:
A. 4.5 hours
B. 4 hours
C. 5.4 hours
D. 6 hours
Answer: Option B
Solution (By Examveda Team)
Let the speed of the stream be x kmph and both the boats meet after t hour. According to the question, (12 + x) × t + (15 - x) × t = 108 Or, 12t + 15t = 108 Or, 27t = 108 ∴ t = $$\frac{{108}}{{27}}$$ = 4 hoursThis Question Belongs to Arithmetic Ability >> Speed Time And Distance
A man rows to a place At a distance of 35km and back.he takes a total of 10hr 30min.he found that he could row 5 km with the stream in same time as he can row 4km against the stream find the rate of the flow of the stream.