Question

A man can swim downstream at 8 km/hour and upstream at 2 km/hour. The speed of the current is
(A) 3 km/hour
(B) 4 km/hour
(C) 5 km/hour
(D) 6 km/hour​

Answer 1

Answer:

3 option is carract p/z tell me something my answer carroct and wrong

Answer 2

The speed of the current is 3 km/hr.

Step-by-step explanation:

Let the speed of the man in still water be "x" km/hr and the speed of current be "y" km/hr.

It is given that,

The speed of man in downstream = 8 km/hr.

So, we have

[speed of man] + [speed of current] = 8 km/hr

∴ Equation (i) : x + y = 8

Also, the speed of man in upstream = 2 km/hr.

So, we have

[speed of man] - [speed of current] = 2 km/hr

∴ Equation (ii): x - y = 5

By subtracting equation (i) & (ii), we get

x + y = 8

x - y = 2

-  +      -

----------------

2y = 6

---------------

∴ y = $\frac{6}{2}$ = 3 km/hr

Thus, the speed of the current is option (A): 3 km/hr.

________________________________________________

Also View:

The speed of a boat in still water is 8 km/hr and the speed of the stream is 2km/hr . the boat is rowed upstream for a certain distance and then taken back to starting point . find the average speed for the whole journey.

https://brainly.in/question/1749712

The speed of a boat in still water is 8km/h. It can go 15 km upstream and 22 km downstream in 5 hours. Find the speed of the stream.

https://brainly.in/question/3902690