Question

Speed of boat still in water is 11km it can go 12 km upstream and return downstream to poini in 2hr 45min

Answer 1

Answer:

Explanation:

Let the speed of the stream = x km/hr

Speed of the boat in still water = 11 km/hr

Speed of the boat downstream = (11 + x) km/hr

Speed of the boat upstream = (11 - x) km/hr

According to the given information,

121 - x2 = 96

x2 = 25

x = 5

Rejecting negative value, as speed cannot be negative. So, x = 5.

Hence, the speed of the stream is 5 km/hr.