How do I convert 12m/s to km/h?

Here

the asked question is

'How many kilometer distance covered in a time of one hour'

i.e. in short form:

?km/1hr

Now, we will try the answer part one by one :

12m/s =12metre/1second

is in a form of fraction.

Therefore

In the given problem,

first,

convert

either

top part(Numerator)

or

lower part(Denominator)

as per the needed answer.

Now,let us take the Numerator:

here it has the value as 12 meter

Convert this value first

into the needed value of kilometer

That is (i.e.) , 12m = 12m/1000 =0.012km

Once the top part is converted then

we can now write the given problem as

0.012km/1second

(Notice the change only in the top(Numerator) of the problem

and we are now have to convert the lower part (Denominator)

that is 1 second) into Hour

Therefore,it is done as given below:

For 1 second period of time if somebody/something travels a distance of 0.012km

then we know

for 1hour or 3600 seconds (As per the needed Denominator value)

(we know.1hr = 60 minutes

= 60 x 60 seconds =3600 s)

that somebody/something will cover

a distance of (0.012km x 3600s) in one hour

The above discussions are now written in mathematical fractional form as follows:

12m ...0.012km....0.012km..

-------=--------------=----------------------

..s.........3600s...........hr..........

........... ..------...... ....-------.......

........... .3600s........3600s....<--This part can be taken to the top (first main Numerator:0.012)

Then, we have the answer as follows:

0.012km.x3600s....43.2..km-hr........

------------------------=------------------.

...............1 hr...............1 hr................

( In the last fraction, Numerator 'hr' and Denominator 'hr' get cancelled)

Therefore, from the last fraction,we are left with the needed answer

as 43.2 km/hr

* * * * *

Just cancel out units with the correct conversion factors.

12m/s*(1km/1000m)*(3600s/1hr)=43.2km/h

1 hour = 3600 seconds

(12 x 3600)/3600 seconds

=43200m/h

1km=1000m

43200:1000/h

43.2km/h