## blackstreet23 one year ago Express the speed limit of 65 miles/hour in terms m/s

1. SolomonZelman

$$\large\color{black}{ \displaystyle 65{\rm miles}{~/~}1{\rm hour} }$$

2. SolomonZelman

convert hours to seconds. 1 hour = 60 minutes 1 minute = 60 seconds Therefore: 1 hour = 360 seconds

3. SolomonZelman

$$\large\color{black}{ \displaystyle 65{\rm miles}{~/~}360{\rm seconds} }$$

4. SolomonZelman

then convert miles to meters.

5. blackstreet23

wouldnt it be 3600?

6. SolomonZelman

1 mile = 1609.34 meters

7. blackstreet23

m/s means meters per second right?

8. SolomonZelman

1609.34 × 65 = 104609.1 $$\large\color{black}{ \displaystyle 104609.1~{\rm miles}{~/~}360{\rm seconds} }$$

9. SolomonZelman

divide top and bottom by 360, and you get?

10. blackstreet23

no i mean. 1 hour = 3600 seconds right? 1*60*60

11. SolomonZelman

12. SolomonZelman

$$\large\color{black}{ \displaystyle 104607.1~{\rm miles}{~/~}3600{\rm seconds} }$$ then divide by 3600 on top and bottom

13. SolomonZelman

http://www.wolframalpha.com/input/?i=%281609.34%C3%9765%29%2F3600 $$\large\color{black}{ \displaystyle 29.057527777777...~{\rm miles}{~/~}{\rm seconds} }$$

14. blackstreet23

I am not understanding

15. SolomonZelman

$$\large\color{black}{ \displaystyle 29.1{\rm m}{/}{\rm s} }$$

16. SolomonZelman

I have this: $$\large\color{black}{ \displaystyle 104607.1~{\rm miles}{~/~}3600{\rm seconds} }$$ then I am dividing by 3600 on top and bottom so that I get meters per seconds.

17. SolomonZelman

and this is what I got: $$\large\color{black}{ \displaystyle 29.1{\rm m}{/}{\rm s} }$$

18. blackstreet23

could you show me the whole process that you are doing, please ?

19. blackstreet23

$65 *\frac{ miles }{ hour } = 65 * \frac{ 1609.34 meters }{ 3600 seconds }$

20. blackstreet23

is it?

21. blackstreet23

@freckles @SolomonZelman @amistre64

22. blackstreet23

29.0575277778

23. blackstreet23

ohh i see now

24. blackstreet23

Thanks a lot !