distance

[eddy2017]

Hi, dear professors:
Today, I have been cataloguing every piece of information that I get here from my teachers. There is a lot info to classify so I know, at least, where to find it if I need it. I have come across this problem that I want to bring to you. The problem has been solved, but I want to make sure it has been solved in the right way.

A car travels 60 km in one hour. At the same rate, what distance will be covered by this car in y hour?.
Solution
d=r * t
d=60 km * 1hr
d=60 km
so, for y hours,
y * 60 km =60y km

When I read it it looked as if something was off here. I just want you to tell me what it is or if it is okay like that.
Thanking you in advance for such a valuable help,
eddy

 

[tkhunny]

[math]\dfrac{60\;km}{1\;hr}\cdot\;y\;hr[/math]
I believe you have it.

 

[eddy2017]

[math]\dfrac{60\;km}{1\;hr}\cdot\;y\;hr[/math]
I believe you have it.

Great, thanks for confirming it. Appreciate it!.

 

[Steven G]

We don't mind checking your problems but you should be able to check it yourself.

Suppose you drove for 2 hours, so y=2. How far did you drive (do not use your formula)? How far does your formula say that you drove?
Suppose you drove for 3 hours, so y=3. How far did you drive (do not use your formula)? How far does your formula say that you drove?
Suppose you drove for 7 hours, so y=7. How far did you drive (do not use your formula)? How far does your formula say that you drove?
Suppose you drove for x hours, so y=x. How far did you drive (do not use your formula)? How far does your formula say that you drove?

Are you getting the same two answer each time?

 

[lev888]

Hi, dear professors:
Today, I have been cataloguing every piece of information that I get here from my teachers. There is a lot info to classify so I know, at least, where to find it if I need it. I have come across this problem that I want to bring to you. The problem has been solved, but I want to make sure it has been solved in the right way.

A car travels 60 km in one hour. At the same rate, what distance will be covered by this car in y hour?.
Solution
d=r * t
d=60 km * 1hr
d=60 km
so, for y hours,
y * 60 km =60y km

When i read it it looked as if something is off here. I just want you to tell me what it is or if it is okay like that.
thanking you in advance for such a valuable help,
eddy

It's correct. But I would use this sequence of steps, which makes it clear from the beginning where we are going.
1. What do we need to find? Distance. The relevant formula is d=rt.
2. Let's see what we have. Time is y hours. Rate is 60kmh.
3. Plugging in the given values: d = 60kmh*y h = 60y km

 

[eddy2017]

We don't mind checking your problems but you should be able to check it yourself.

Suppose you drove for 2 hours, so y=2. How far did you drive (do not use your formula)? How far does your formula say that you drove?
Suppose you drove for 3 hours, so y=3. How far did you drive (do not use your formula)? How far does your formula say that you drove?
Suppose you drove for 7 hours, so y=7. How far did you drive (do not use your formula)? How far does your formula say that you drove?
Suppose you drove for x hours, so y=x. How far did you drive (do not use your formula)? How far does your formula say that you drove?

Are you getting the same two answer each time?.
Yes, I am getting the same answer.

 

[eddy2017]

60 * 2 =120
60 * 3=180
60 * 4=240, etc
I am getting the same answer (same distance, I mean ) when I multiply the value of y * 60.

 

[eddy2017]

It's correct. But I would use this sequence of steps, which makes it clear from the beginning where we are going.
1. What do we need to find? Distance. The relevant formula is d=rt.
2. Let's see what we have. Time is y hours. Rate is 60kmh.
3. Plugging in the given values: d = 60kmh*y h = 60y km

Thanks, I like it this way. Way clearer!.

 

[eddy2017]

It's correct. But I would use this sequence of steps, which makes it clear from the beginning where we are going.
1. What do we need to find? Distance. The relevant formula is d=rt.
2. Let's see what we have. Time is y hours. Rate is 60kmh.
3. Plugging in the given values: d = 60kmh*y h = 60y km

60y km. Great.
Following the formula makes it so easy. Thanks.

 

[eddy2017]

Thanks a lot, Dr Jomo!.

 

[lev888]

60y km. Great.
Following the formula makes it so easy. Thanks.

Distance? No, it's 60y km. I shortened kmph to kmh in rate units, if there is any confusion.

 

[eddy2017]

Distance? No, it's 60y km. I shortened kmph to kmh in rate units, if there is any confusion.

Yes, you're right. It is distance only.

 

[Steven G]

Thanks a lot, Dr Jomo!.

I have not earned the title of Dr yet. You can refer to me as Instructor, Professor or simply Jomo