Question

Convert 54km per hour into m/s​

Answer 1

Answer:

54×1000/3600

= 54×10/36

=54×5/18

=3×5 (54/18=3)

=15 m/s

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Answer 2

Answer:

15 m/s

Step-by-step explanation:

We have,

$54 \: km \: {hr}^{ - 1}$

$= \frac{54 \: \: km}{1 \: \: hour}$

$= \frac{54 \times 1 \: \: km}{1 \: \: hour}$

$= \frac{54 \times 1000 \: \: metres}{60 \: \: minutes}$

$= \frac{54 \times 1000 \: \: metres}{60 \times 1 \: \: minute}$

$= \frac{54 \times 1000 \: \: metres}{60 \times 60 \: \: seconds}$

$= \frac{6 \times 3 \times 3 \times 10 \times 10 \times 10 \: \: metres}{6 \times 3 \times 2 \times 10 \times 10 \: \: seconds}$

$= \frac{1 \times 1 \times 3 \times 1 \times 1 \times 10 \: \: metres}{1 \times 1 \times 2 \times 1 \times 1 \: \: seconds}$

$= \frac{3 \times 5 \times 2 \: \: metres}{2 \: \: seconds}$

$= \frac{3 \times 5 \times 1 \: \: metres}{1 \: \: second}$

$= 15 \: metres \: per \: second$

$= 15 \: m \: {s}^{ - 1}$