A car is traveling 40 kilometers per hour. What is the speed of that car in meters per second?

Mathematics

2 answers:

swat322 years ago

5 0

Speed of car in km/h=40km/h

We have to convert it to m/s

$\boxed{\sf 1km/h=\dfrac{5}{18}m/s}$

$\\ \sf\longmapsto 40km/h$

$\\ \sf\longmapsto 40\times \dfrac{5}{18}$

$\\ \sf\longmapsto \dfrac{200}{18}$

$\\ \sf\longmapsto 11.1m/s$

VMariaS [17]2 years ago

3 0

km/h > m/s

when converting km/h to m/s all you need to do is divide by 3.6

and vise versa when converting m/s to km/h multiply by 3.6

so therefore,

40km/h > m/s

= 40 / 3.6

= 11.11 m/s (4sf)

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Rufus appears before Bill and Ted and offers them a bogus proposition: they must paint a house together with their magical guita

jolli1 [7]

Answer:

6.79

Step-by-step explanation:

-Let X denote the total amount of the job.

-The job has to be done in 5 hrs, therefore the portion done every hour is:

$Rate=\frac{Total}{Time}\\\\=\frac{X}{5}\\\\=\frac{1}{5}X=0.2X$

Therefore, the rate of Bill and Ted working jointly must equal the rate calculated above:

$R_{Bill}=\frac{X}{19}\\\\=\frac{1}{19}X\\\\R_{Bill}+R_{Ted}=R_{required}\\\\\frac{1}{19}X+R_{Ted}=\frac{1}{5}X\\\\R_{Ted}=\frac{1}{5}X-\frac{1}{19}X\\\\=\frac{14}{95}X\\\\\therefore \frac{14}{95}X=1\ hr\\\\X=1\div \frac{14}{95}\\\\=6.7857\approx 6.79$ $hrs$