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 & Solution

Correct Answer: Option B

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 hours

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Namrita Srivastava 7 years ago

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.

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Two boats A and B start towards each other from two...

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:

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