How do you solve upstream and downstream questions?

Upstream and Downstream – Formula
Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.Speed of Boat in Still Water = ½ (Downstream Speed + Upstream Speed)

What is the speed of the boat in still water 1 The boat covers a distance of 140 km in 7 hours upstream 2 The boat covers the same distance in 5 hours downstream?

∴ speed of the boat in still water is 25 km/h

Learn today!

What will be the speed of boat in still water?

Given that, the speed boat in still water is 11 km/hr. It is mentioned that the boat can go 12 km upstream and return downstream to its original point in 2 hr 45 min. As speed to stream can never be negative, we consider the speed of the stream(x) as 5 km/hr.

Is upstream still water?

First, let us explain the meaning of “upstream” and “downstream.” When a boat travels in the same direction as the current, we say that it is traveling downstream. When a boat travels against the current, it travels upstream. The speed of a boat in still water is 30 mph.

What is speed of boat while going downstream?

When the boat goes downstream then the speed will be (b + w) km/hr as in this case the water will take the boat along with it. When the boat goes upstream then the speed will be (b – w) km/hr as in this case the water will offer resistance to the boat. Adding the two equations, we get 2b = d + u.

How long will it take to row 20 km upstream if a man can row 10 km in 10 minutes in still water and the same distance in 8 minutes with the stream?

Time requires to travel 20 km upstream is 26.67 min .

One can row 10 km in 10 minutes in still water . The same distance in 8 minutes with the stream .

What is the speed of the boat in still water if the boat covers a distance of 72 km?

Find the speed of the boat in still water and the speed of the water current ? speed of boat = (9+7)/2kmph = 8 kmph.

What would be the time taken by a boat to go 80 km downstream if the speed of the stream is 5 km HR and the boat’s speed in still water is 15km hr?

What would be the time taken by a boat to go 80 km downstream if the speed of the stream is 5 km/hr and the boat’s speed in still water is 15km/hr? Solution: Downstream speed of the boat= (15 + 5)= 20 km/hr. Time taken by the boat to go 80 km downstream= (80/20) hours= 4 hrs.

How much time would it take to cover a distance of 120 km Travelling upstream when the speed of the boat in still water is 20 km per hour?

The total time taken by a boat to go 120 km upstream and came back to the starting point is 8 hours. If the speed of the stream is 25% of the speed of the boat in still water, then find the difference between the upstream speed and the downstream speed of the boat.

What is the speed of the river?

“Speed also varies along the stream channel, being fastest where the channel is narrowest and the gradient steepest, and it changes with time, being fastest at flood stage. Speed probably varies from about 3 ½ to 7 miles per hour.”

Can boats go upstream Minecraft?

No rowing, rails, minecarts, redstone gadgets, or bubble columns are needed, just a boat and water. The boat can even change elevation up or down using only the power of water flow.

What is the rate of the stream upstream speed of boat is 18 km hr?

Answer: The speed of the stream is 6 km/hr.

Given that, the speed boat in still water is 18 km/hr. As speed to stream can never be negative, we consider the speed of the stream (x) as 6 km/hr.

What is upstream flow?

Upstream means that the object is going opposite to the flow of the river. In this case you have to subtract the speed of the given object in still water from the speed of flow of the stream. Downstream means that the object is flowing along the river and in this case you have to add the speed.

Why do boats sail faster downstream?

The boat must be moving somewhat sideways. In that “crabbing” motion, the keel moves through the water with an angle of attack. Just as for the sails in the wind, that causes the water on the “high” (more downstream) side of the keel to move faster and create a lower pressure.