This question seems very easy but I can't get the answer. I think "m" should not be presented in the answer choices
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Abdulla
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Source: Beat The GMAT — Problem Solving |
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viju9162
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Hi Abdulla,
Answer is D.
K kms in "m" minutes. As hours is mentioned, let us convert "m" minutes to hours.
It will be "m/60" hours. Let "x" be the unknown value.
k : m/60 : : x : h
therefore x = 60kh/m.
Answer is D.
K kms in "m" minutes. As hours is mentioned, let us convert "m" minutes to hours.
It will be "m/60" hours. Let "x" be the unknown value.
k : m/60 : : x : h
therefore x = 60kh/m.
"Native of" is used for a individual while "Native to" is used for a large group
I am always confused with such conversion..viju9162 wrote:Hi Abdulla,
Answer is D.
K kms in "m" minutes. As hours is mentioned, let us convert "m" minutes to hours.
It will be "m/60" hours. Let "x" be the unknown value.
k : m/60 : : x : h
therefore x = 60kh/m.
Usually, I write the labels so i don't get confused but in this problem i can't do it.
for example: to convert 1 km/min to meters/h..
1km / 1min * 1000 meter/1km = 1000 meter/1min then * 60 min/ 1h = 10000 meter/ 1h ...
so the km and the min will cancel each others ... but in the above problem I have no idea how to do it.
Abdulla
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viju9162
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ohh.. you need not convert km into meter..because the question is in the format " km/minute". Hence, it is enough to convert hours to minutes.
As I described below, let us convert what the question asks for. Then it becomes easier to deduce
. Hope this helps.
Regards,
viju
As I described below, let us convert what the question asks for. Then it becomes easier to deduce
. Hope this helps.Regards,
viju
"Native of" is used for a individual while "Native to" is used for a large group
My example was a random one.viju9162 wrote:ohh.. you need not convert km into meter..because the question is in the format " km/minute". Hence, it is enough to convert hours to minutes.
As I described below, let us convert what the question asks for. Then it becomes easier to deduce
Regards,
viju
let's try this one...
k/m min * 60 min/h = 60k/mh ??? what's wrong with it?
Abdulla
lets say rate -> K/M is in units kilometers / minute
If need to convert that M from minutes to hours, just divide that M by 60 .....K/(M/60) = (60 *K)/M ..... units Km/hr
If need to convert that M from minutes to hours, just divide that M by 60 .....K/(M/60) = (60 *K)/M ..... units Km/hr
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Gmatter2.0
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Let's do it this way:
Let k=100 km
Let m=50 min
Let h=6
100 Km---------> 50 min
? ---------> 6 hrs
Convert 6 hrs to min
100 Km---------> 50 min
x? ---------> 6 * 60 min
100/x=50/6*60
6*60 *100/50=x
Now reverse substitute values for 6=h, 100=k and 50=m
h*60*k/m
kh60/m
is the Answer...
Let k=100 km
Let m=50 min
Let h=6
100 Km---------> 50 min
? ---------> 6 hrs
Convert 6 hrs to min
100 Km---------> 50 min
x? ---------> 6 * 60 min
100/x=50/6*60
6*60 *100/50=x
Now reverse substitute values for 6=h, 100=k and 50=m
h*60*k/m
kh60/m
is the Answer...
You're mixing up the variable h with the unit h above. k/m is in units of kilometers/minute. Multiplying by 60 min/hour gives the result of 60k/m, which is in units of kilometers/hour. Multiplying this result by h which has the units of hours results in 60kh/m, which has units of kilometers.Abdulla wrote:My example was a random one.viju9162 wrote:ohh.. you need not convert km into meter..because the question is in the format " km/minute". Hence, it is enough to convert hours to minutes.
As I described below, let us convert what the question asks for. Then it becomes easier to deduce
Regards,
viju
let's try this one...
k/m min * 60 min/h = 60k/mh ??? what's wrong with it?
Keep units separate in your mind from the variable - they purposely called the variables h,k,m to confuse you. Rename them to x,y and z if you like to avoid confusion with the abbreviation for the UNITS
appreciate it if anyone one tell me why C is wrong ? k/ m = rate -----> convert to k/h -----> k/60m ------> distnce traveled = rate * time ====> kh/60m
Please help
Please help
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viju9162
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Hi Heshamelaziry,
Once you converted "h" into "m" ( .i.e hours into minutes), why are you again multiplying the result with "h" ( hour) again.
As I mentioned in the below loop, it is enough to convert hours into minutes as the question demands it.
Regards,
Viju
Once you converted "h" into "m" ( .i.e hours into minutes), why are you again multiplying the result with "h" ( hour) again.
As I mentioned in the below loop, it is enough to convert hours into minutes as the question demands it.
Regards,
Viju
"Native of" is used for a individual while "Native to" is used for a large group
Then, should it be kh/60 ?viju9162 wrote:Hi Heshamelaziry,
Once you converted "h" into "m" ( .i.e hours into minutes), why are you again multiplying the result with "h" ( hour) again.
As I mentioned in the below loop, it is enough to convert hours into minutes as the question demands it.
Regards,
Viju
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viju9162
- Master | Next Rank: 500 Posts
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It cannot be kh/60 because the equation will look like this:
k : m/60 : : x : h
X is unknown value.. by cross-multiplying, you will get the right answer.
k : m/60 : : x : h
X is unknown value.. by cross-multiplying, you will get the right answer.
"Native of" is used for a individual while "Native to" is used for a large group
Hi Abdulla,
Solution can be explained in the following way...
Car is travelling at k km/m-mins
So we will approach this prob by basic caluculations, no need of any formulae..
For m Mins ---> K Kms(Distance Travelled)
For 60 Mins----> d = ?
This gives d = 60k/m per hr.
So by the above caluculation we hav got for 1 hr distance travelled is 60k/m.
1 hr ---> 60 k/m
h hrs ---> D = ?
This gives value D as 60kh/m.
Rgds,
AVR.
Solution can be explained in the following way...
Car is travelling at k km/m-mins
So we will approach this prob by basic caluculations, no need of any formulae..
For m Mins ---> K Kms(Distance Travelled)
For 60 Mins----> d = ?
This gives d = 60k/m per hr.
So by the above caluculation we hav got for 1 hr distance travelled is 60k/m.
1 hr ---> 60 k/m
h hrs ---> D = ?
This gives value D as 60kh/m.
Rgds,
AVR.
