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anonymous

  • one year ago

A car travels 100 meters in 5 seconds. What is the speed of the car? speed = distance over time; 1 mile = 1609 meters

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  1. anonymous
    • one year ago
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    i need a walk through

  2. Michele_Laino
    • one year ago
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    by definition, the speed of the car is: \[\Large speed = \frac{{{\text{distance}}}}{{{\text{time}}}}\]

  3. anonymous
    • one year ago
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    100 miles is distance and

  4. anonymous
    • one year ago
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    5 secs is time

  5. anonymous
    • one year ago
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    So how much is 100m in miles?? 100/1609 right? :D And how much is 5 seconds in hours? 5/3600 right? :D So miles/hour = \[\frac{ 100 }{ 1609 }*\frac{ 3600 }{ 5 }\] 44.7 miles

  6. campbell_st
    • one year ago
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    if you multiply both values by 12 you will know how many metres in 1 minute this is because 12 x 5 = 60 then multiply the answer by 60 to find how many metres in 1 hour does that make sense..?

  7. Michele_Laino
    • one year ago
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    \[\Large speed = \frac{{{\text{distance}}}}{{{\text{time}}}} = \frac{{100}}{5} = ...miles/\sec \]

  8. anonymous
    • one year ago
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    20

  9. Michele_Laino
    • one year ago
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    correct! it is 20 miles/seconds

  10. anonymous
    • one year ago
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    ????

  11. Michele_Laino
    • one year ago
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    we can change unit of measure, namely we can measure that speed in Km/hour

  12. anonymous
    • one year ago
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    so 20 is the right answer not what they said?

  13. Michele_Laino
    • one year ago
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    20 miles /seconds, is your speed, and as you can see , the corresponding unit of measure is miles/seconds

  14. Michele_Laino
    • one year ago
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    nevertheless, if we want to change unit of measure, of course, we get a different answer

  15. anonymous
    • one year ago
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    20

  16. anonymous
    • one year ago
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    so thats all i had to do

  17. anonymous
    • one year ago
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    @Buttercup214 its 20

  18. Michele_Laino
    • one year ago
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    yes! if you want the speed in miles/seconds, that is all!

  19. anonymous
    • one year ago
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    oh sorry i forgot to say thank you.

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