A boat travels 60 kilometers upstream in 3 hours and covers the same distance of 60 kilometers downstream in 2 hours. What is the speed of the boat in still water?
25 km/h
Step 1 – Find upstream and downstream speeds:
Upstream speed \(= \dfrac{60}{3} = 20\) km/h
Downstream speed \(= \dfrac{60}{2} = 30\) km/h
Step 2 – Speed in still water:
\(= \dfrac{\text{Upstream} + \text{Downstream}}{2} = \dfrac{20 + 30}{2} = 25\) km/h
Hence, the speed of the boat in still water is 25 km/h.
A boat sails 15 km of a river towards upstream in 5 hours. How long (in hours) will it take to cover the same distance downstream, if the speed of river is one-fourth the speed of the boat in still water?
The speed of boat upstream is 5 kmph. Its speed in still water is 10 kmph. How many minutes will it take to row 25 km downstream?
Sudha can travel a certain distance downstream in 6 hours by boat and return to the starting point in 9 hours. If the stream flows at a speed of 3 km/h, how long (in hours) will it take to cover a distance of 67.5 km in still water?
The downstream speed of a boat is 20 km/hr and the speed of stream is 4 km/hr. What will be the total time taken by the boat to cover 160 km downstream and 96 km upstream?
A man covered a distance of 18 km in 3 hours, 7.2 km in 2 hours and 15 km in 5 hours. What is the average distance traveled by him per hour?