Practicing Success
The speed of a boat in still water is 5 km/h. If it can travel 26 km downstream and 14 km upstream in the same time, then the speed of the stream is |
1.5 km/h 2 km/h 2.5 km/h 3 km/h |
1.5 km/h |
Let the speed of the stream be x km/hour. Then speed of the boat in downstream will be (26+x)km/hour. And speed of the boat in upstream will be (26−x)km/hour. As given,the boat travels 26km downstream and 14km upstream at the same time. = \(\frac{26}{5+x }\) = \(\frac{14}{5-x }\) = 26(5−x) = 14(5+x) = 130−26x = 70+14x = 60 = 40x x = 1.5km/hour |