Amotorboat can maintain a constant speed of 25 miles per hour relative to the water. the boat makes a trip upstream to a certain point in 48 minutes; the return trip takes 27 minutes. what is the speed of the current?

The speed of the current is 7 miles per hour .

Step-by-step explanation:

Given as :

The speed of motorboat = x = 25 miles per hour

The Time taken to make upstream trip = 48 minute = = 0.8 hour

And The time taken to make downstream trip = 27 minutes = = 0.45 hour

Let The speed of the current = y  miles per hour

Let The total distance cover = D miles

Now, Speed =

So , For upstream trip

x - y =

Or, D =   × ( x - y )             ........1

And , For downstream trip

x + y =

Or, D =   × ( x + y )            .......2

Now, equating the eq 1 and 2

I.e 0.8 × ( x - y ) = 0.45 × ( x + y )  

Or, 0.8 x - 0.8 y = 0.45 x + 0.45 y

Or, 0.8 x - 0.45 x = 0.8 y + 0.45 y

or, 0.35 x = 1.25 y

Now since x = 25 miles per hour

So,  0.35 × 25 = 1.25 y

or, y =

∴ y = 7

So, The speed of current = 7 miles per hour

Hence The speed of the current is 7 miles per hour . Answer

c.   x=2.4cm

step-by-step explanation:

similar triangles are triangles which have the same shape but not the same size. this means their angle measures are equal but their side lengths are not instead they are proportional. to solve, we will set up a proportion and solve.

a proportion is two equal ratios set equal to each other. we form the ratios by finding corresponding sides (sides which match to each other on both triangles by their position). out ratios will be one side of the small triangle over the corresponding side on the big triangle as shown below:

.

to solve the proportion, we'll cross multiply by multiplying numerator with denominator across the equal sign.

answer: 2 answers

step-by-step explanation: the first one means to spread the product throughout the marketplace such that a large number of people can buy it.  

the second means the process of making a product or service available for the consumer or business user that needs it.

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