SOLUTION: Please help me solve, Iam unsure how to set up the problem... it shows in the book but I cannot understand the explanation #6. If a car travels 1/100 kilometer each second,

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Question 203758: Please help me solve, Iam unsure how to set up the problem... it shows in the book but I cannot understand the explanation


#6. If a car travels 1/100 kilometer each second, how many kilometers does it travel in an hour?

I tried this 1/100*120 seconds... this is not right, I dont understand why.
Found 4 solutions by Alan3354, solver91311, MathTherapy, stanbon:
Answer by Alan3354(69443) About Me  (Show Source):
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#6. If a car travels 1/100 kilometer each second, how many kilometers does it travel in an hour?
I tried this 1/100*120 seconds... this is not right, I dont understand why.
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0.01 km/sec = 0.01 km/sec *60 sec/min * 60 min/hr
= 0.01*60*60 km*sec*min/(sec*min*hr)
= 36 km/hr
Notice how including the units makes it clearer.

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


I'm not exactly sure how you derived the 120 in , but I suspect that you added 60 seconds per minute to 60 minutes per hour. That makes as much sense as adding 3 apples to 4 math homework assignments -- which is to say no sense at all.

Each minute consists of 60 seconds. So, the first minute is 60 seconds, and the second minute has 60 seconds, so 2 minutes has seconds. 3 minutes would be seconds, and so on. But an hour has 60 minutes, so an hour is , for 60 terms of 60 each which is the same as

So what you need is:




John

Answer by MathTherapy(10551) About Me  (Show Source):
You can put this solution on YOUR website!

Since 1 hour equals 3,600 seconds (60 seconds = 1 min, & 60 mins = 1 hour), and since 1%2F100+=+.01, the following proportion can be used to find the amount of kilometers the car travels in 1 hour:

%28.01%29%2Fk=1%2F3600

k = 3,600(.01) = 36 kilometers.

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
#6. If a car travels 1/100 kilometer each second, how many kilometers does it travel in an hour?
---
There are 60 seconds in a minute and 60 minutes in an hour,
so there are 3600 seconds in an hour.
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Your Problem:
[(1/100)km/sec]sec = [36]km
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Cheers,
Stan H.
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