# How do you convert 1.47 km/h to mm/s?

##### 1 Answer

A lot of detail given about the conversion process. It would not normally involve so much writing to calculate this.

#### Explanation:

1 Km = 1000 metres so

1 metre = 1000 mm so

Thus the total distance is

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

1 hour = 60 minutes

But 1 minute = 60 seconds

So 1 hour =

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Notice I put a

So all we need to do now is to change the 3600 seconds into 1 second but in doing so still retain the ratio of millimetres to seconds.

To maintain proportionality what you do to the bottom you also do to the top (Only works for multiply or divide).

Divide by 3600

But 3600 is the same as

So for the numerator we have

For the denominator

This would normally be written as

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The bar 3 as

in that we have 4.08333333333......