### Quantitative Aptitude

## BOATS AND STREAMS MCQs

### Total Questions : 646

**Page 1 of 33 pages**

### What is boat and streams?

Stream – The moving water in a river is called a stream.

Upstream – If the boat is flowing in the opposite
direction to the stream, it is called upstream. In this case, the net speed of
the boat is called the upstream speed. Downstream – If the boat is flowing
along the direction of the stream, it is called downstream

### How do you solve a boat and stream question?

Remember it with DOWN as going down the hill means towards the direction of the force (speed) of the river. If speed of boat or swimmer is x km/h and the speed of the stream is y km/h then, Speed of boat downstream = (x + y) km/h.

### What is rate of current in boats and streams?

1) Still water: The water of a river or any other water body which is not flowing is known as still water. 2) Stream: It is the flowing water of a river which is moving at a certain speed. 3) Upstream: The boat or a swimmer moving against the stream is known as moving upstream i.e. against the flow of water.

### What is the formula of upstream and downstream?

If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr. Speed upstream = (u - v) km/hr. (a + b) km/hr.

### What is boat B's speed in still water?

The speeds of two boats A and B in still water are 7.5 m/s and 12.5 m/s respectively and the speed of the stream is 2.5 m/s.

### What is the speed of the stream if a boat travels?

Speed of stream = 2 km / hr. ∴ Speed of boat in still water = 15 + 2 = 17 km / hr. Q8. A motorboat can travel at 5 km/hr in still water.

### How can you move the boat in the still water?

So if boatman wants to move the boat ahead in water, he has to push the water backwards. By pushing the water, boatman applies a force on water in backward direction. In turn, water applies the same amount of force in forward direction, moving the boat ahead.

### What is the average speed of stream and boat in still water?

Speed of the boat in still water = ½ (32 + 28) km/hr. = 30 km/hr. Speed of the stream = ½ (32 – 28) hm/hr.

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

A boat goes upstream at a speed of 18 km/hr. The boat comes back the same distance at 30 km/hr. ∴ The average speed (in km/hr) for the total journey is 22.5 km/h.

### Is upstream against the current?

The definition of upstream is against the current, or toward the beginning. An example of upstream used as an adjective is the phrase "an upstream swim," which means a swim against the current.

### Why do boats sail faster downstream?

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.

### What is the speed of stream?

In water, the direction along the stream is called downstream. And, the direction against the stream is called upstream. If the speed of a boat in still water is u km/hr and the speed of the stream is v km/hr, then: Speed downstream = (u + v) km/hr.

### What is still water in boats and streams?

Important Terms. Still Water: If the speed of the water is zero, i.e. water is stationary, then it is called still water. Stream: The moving water in the river is known as a stream. Upstream: If a boat or a swimmer moves in the opposite direction of the stream, then it is called upstream.

### How do you determine upstream and downstream?

Downstream means towards where the flow ends, at the opposite end of the waterway from the source. If you are boating from Kingston to Toronto, for example, you are heading upstream. If you are going from Kingston to Cornwall, you are travelling downstream.

### What is the ratio of boat A upstream speed and boat e speed in still water?

The ratio of speed of boat in still water to speed of stream is 8 : 1.

### What is upstream and downstream 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.

### How do you calculate stream rate?

Important Formulas - Boats and Streams

1. Downstream. In water, the direction along the stream is called downstream.

2. Upstream. In water, the direction against the stream is called upstream. Let the speed of a boat in still water be u km/hr and the speed of the stream be v km/hr, then. Speed downstream = (u + v) km/hr.

### Why does a boat come to rest when one stop growing it?

The boat comes to rest when we stop rowing it due to the force of friction acting between the surface of water and the boat.

### How do you tell which way is upstream?

If you are entering a channel or waterway from the sea, you are traveling upstream. Water will often flow from north to south. This means that if you're traveling north, you will likely be boating upstream.

### How do I find the boat rate in still water?

Upstream and Downstream – Formula:

1. Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.

2. Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.

3. Speed of Boat in Still Water = ½ (Downstream Speed + Upstream Speed)

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