3 years ago

Convert 25 m/s into km/hr.

Mathematics

1 answer:

guapka [62]3 years ago

3 0

Answer:

Step-by-step explanation:

This method is known as dimensional analysis. Where a unit (and its number) appears in the numerator of a fraction, it appears in the denominator of the next fraction. You should always carry the units from 1 fraction to the next.

25 m 1 km 3600 seconds

==== * [ ====== ] * [==========]

sec 1000 m 1 hour

Notice how the units are going to cancel. What you are left with is

25 m * 3600 * 1 km

==============

sec 1000 m * 1 hour

90000 km

======

1000 hour

90 km / hour

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