Aboat goes 50 km downstream in the same time that it takes to go 30 km upstream. the speed of the stream is 3km/hour. find the speed of the boat in still water.

The speed of the boat in still water is 12 km/hour.

Step-by-step explanation:

Given:

Boat goes 50 km downstream and 30 km upstream. The speed of the stream 3 km/hour.

Now, to find the speed of the boat in still water:

Let the speed of boat in still water be .

The speed of the downstream be

And, the speed of the upstream be

And, now we find the time by putting the formula:

So, downstream time is:

So, upstream time is:

According to question:

Time upstream = Time downstream

By cross multiplication:

By taking variables in one side and taking numbers on the other side we get:

Dividing both sides by 20 we get :

Therefore, the speed of the boat in still water is 12 km/hour.

the data of the detroit pistons in numerical order from least to greatest is 0.30, 0.37, 0.55, 0.62, 0.69, 0.72, 0.73, 0.75, 0.77, 0.78, 0.80, 0.81, 0.81, 0.83, 0.84, 0.89

the data of the miami heat in numerical order from least to greatest is 0.50, 0.50, 0.56, 0.57, 0.67, 0.72, 0.72, 0.72, 0.75, 0.75, 0.76, 0.81, 0.82, 0.90, 1.00, 1.00

the detroit pistons median : 1.52

the miami heat median: 1.47

the iqr of this data is 0.05

in the math equation 8 x 7 = 56, the 8 and the 7 are both factors of 56, since in this lesson we will use square tiles to figure out the factors of a whole find as many different arrays as you can, but follow one important rule: all the rows must have the i can make two rows of nine, so 2 and 9 are both factors of 18.

step-by-step explanation: