Question

Express each of the following speed in meter per second 7km per hour

Answer 1

7km/hr
7000m/60×60(sec)

7000/3600

70/36

35/19m/sec

Answer 2

$\sf\underline{Step-by-step \: explanation}$

A rule :

☆ To convert m/s to km/h, multiply m/s with 18/5

☆ To convert km/h to m/s, multiply km/h with 5/18.

Solving;

》Given speed is in km/h. So, ultimately, it has to be multiplied with 5/18

Doing it,

$\sf\dfrac{7}{1}$ × $\sf\dfrac{5}{18}$

After Cancellation...

1.9$\overline{4}$

》As the speed can't be witten in bars, it will be,

¤ 1.944 m/s

Verification :

》To verify, we can multiply it with 18/5

Solving,

$\sf\dfrac{1.944}{1}$ × $\sf\dfrac{18}{5}$

After Cancellation...

7 (Approx.)

{As the value can't be taken bar (1.944), the value of the original one had to be approx.}

Other Formulas :

Abbreviations :

D - Distance

S - Speed

T - Time.

D = S × T

T = D/S

S = D/T