If a boat moves against the water stream, then the net speed or the effective speed of the boat will decrease and it said to be downstream.

True

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False

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Solution

The correct option is B
False

Consider, a boat moving at a speed of S1 and the speed of the water stream is S2.

If the stream and boat are moving in the same direction(Downstream or along the stream), the Effective speed of the boat = S1 + S2, means that speed of boat will increase

And, If the stream and boat are moving in the opposite direction(Upstream or against the stream), the Effective speed of the boat = S1 - S2, means the speed of boat will decrease.

So, If a boat moves against the water stream, then the net speed or the effective speed of the boat will decrease and it said to be upstream. So, the given statement is false.

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Similar questions

If a boat moves along with the water stream, then the net speed or the effective speed of the boat will increase and it said to be downstream.

If the speed of the boat in still water is $x \frac{k m}{h}$ and speed of the stream is $y \frac{k m}{h}$ .

S1 : upstream speed of the boat is $(x - y) \frac{k m}{h}$

S2 : downstream speed of the boat is $(x + y) \frac{k m}{h}$

Q. A boat goes

48 k m

downstream in

20 h

. It takes

4 h

more to cover the same distance against the stream. What is the speed of the boat in still water ?

Assume that you are in a boat which moves with a speed of 13 km/hr (in still water) against the water flow. And the speed of the stream is 9 km/hr. Then what is the effective speed of your boat in this case?

Q. A boat goes 24 km upstream and 28 km downstream in 6 hrs. It goes 30 km upstream and 21 km downstream in

6 \frac{1}{2} hrs

. Find the speed of the boat in still water and also speed of the stream.

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