Question

A boat covers a certain distance down stream in 3hours and same distance upstream in 5 hours.if the speed of the boat is still water is 8 km/ hr.find the speed of the stream​

Answer 1

Answer:

Step-by-step explanation:

4.50kmph

Speed of boat

Mark me as brainlieist

Thankyou

Answer 2

The speed of the stream is 2m/s.

Given:-

Time taken by boat in Downstream (x) = 3 hours

Time taken by boat in Upstream (y) = 5 hours

Speed of boat in still water (u) = 8km/hr

To Find:-

The speed of the stream.

Solution:-

We can simply find out the speed of the stream, by using the following steps which includes,

Now,

Time taken by boat in Downstream (x) = 3 hours

Time taken by boat in Upstream (y) = 5 hours

Speed of boat in still water (u) = 8km/hr

Speed of the stream (v) = ?

According to the formula,

Speed of boat = speed of stream* Time taken by boat in Downstream + Upstream/ Time taken by boat in Downstream - Upstream

$u = \frac{v \times (x + y)}{( y - x)}$

$v = \frac{u \times ( y - x)}{( x+ y)}$

$v = \frac{8 \times (5 - 3)}{(5 + 3)}$

$v = \frac{8 \times 2}{8}$

v = 2m/s

Hence, The speed of the stream is 2m/s.

#SPJ2