Question

a boat can travel 102 km downstream in 6 hours. if the speed of the stream is 2.5 kmph. how much time will the boat take to cover a distance of 66 km upstream ?

Answer 1

The boat will take 4.4 hours to cover a distance of 66 km upstream.

Step-by-step explanation:

To calculate the time it will take for the boat to cover a distance of 66 km upstream, we need to consider the speed of the boat and the speed of the stream. The speed of the boat in still water can be calculated by subtracting the speed of the stream from the speed of the boat downstream. In this case, the speed of the boat in still water would be 102 km / 6 hours - 2.5 km/h = 15 km/h.

Now, we can calculate the time it will take for the boat to cover 66 km upstream using the speed of the boat in still water. Time = Distance / Speed. Therefore, Time = 66 km / 15 km/h = 4.4 hours.