Question

A speedboat is travelling in a river. The speed of the boat in still water is 25 mph and the rate of flow of the river is 5 km h. Moving with the stream, the boat travelled 150 km in a certain amount of time. What distance (in km) will the boat cover in the same amount of time, if it were going against the stream

Answer 1

Answer:

100 km

Explanation:

assuming 1 mile=1km

time needed in first case = 150/(25 + 5) hrs = 3hrs

therefore distance covered in second case = (25-5) × 3 = 100 km