Question 393740: I have to convert these to miles per hour.
1) A helicopter can travel 2.5 miles in one hour. What is the speed of this helicopter in miles per minute?
2) An ant can travel 25 feet per minute. What is the speed of the ant in miles per hour?
I kind of know how to set it up, i think.
Would you do,
2.5mi
-------- (That's 2.5 mi. over 1 min.)
1 min.
I don't know if that's how your supposed to do it. Don't I have to convert something? I don't know!
Please help!
Thanks!
Found 3 solutions by stanbon, ewatrrr, Edwin McCravy:
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1) A helicopter can travel 2.5 miles in one minute. What is the speed of this helicopter in miles per hour?
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(2.5 miles/min)(60 min/1 hr) = (2.5*60)/(1*1) miles/hr. = 150 miles/hr
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2) An ant can travel 25 feet per minute. What is the speed of the ant in miles per hour?
(25 ft/min)(1 mile/5280 ft)(60 min/1 hr) = (25*1*60)/(1*5280*1)(miles/hr)
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= 0.2841 miles/hr
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Cheers,
Stan H.
Answer by ewatrrr(24785)  (Show Source):
You can put this solution on YOUR website!
Hi
speed in mph for the folowing
1)helicopter can travel 2.5 miles in one hour
speed is 2.5mph
2)ant can travel 25 feet per minute (60min = 1hour)
that is: 25*60ft in one hour OR 1500/5280 miles in one hour (5280ft = 1 mile)
speed is .284mph
Answer by Edwin McCravy(20064)  (Show Source):
You can put this solution on YOUR website! 1) A helicopter can travel 25 miles in one hour. What is the speed of this helicopter in miles per minute?
"Miles per hour" means the same as "miles in ONE hour" which also means
"miles OVER hours" or  where  means "miles" and  means hours.
So to convert
to  (where  means "minutes")
We use the fact that  =  to build a unit fraction with
one of those in the numerator and the other in the denominator, either
 or  , whichever serves the purpose of getting rid of the hours and bringing in the minutes .
To decide which one we want in the numerator and which in the denominator,
we observe that
has in the denominator. So to cancel away the in the denominator we need
an in the numerator, So we make the unit fraction
and multiply it by  like this
Then we can cancel the hours ('s) like this:
and all that's left is
which is the same as
which can be reduced to
or as a decimal .4166666667
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2) An ant can travel 25 feet per minute. What is the speed of the ant in miles per hour?
So to convert
to (where  means "feet")
We again use the fact that = to build a unit fraction with
one of those in the numerator and the other in the denominator, either
or , whichever serves the purpose of getting rid of the minutes and bringing in the hours .
To decide which one we want in the numerator and which in the denominator,
we observe that
has in the denominator. So to cancel away the in the denominator we need
an in the numerator, So we make the unit fraction
and multiply it by like this
Then we can cancel the hours ('s) like this:
But now we must also get rid of the feet and bring in the miles:
So now we use the fact that  =  to build a unit fraction with
one of those in the numerator and the other in the denominator, either
 or  , whichever serves the purpose of getting rid of the feet and bringing in the miles .
To decide which one we want in the numerator and which in the denominator,
we observe that
has in the numerator. So to cancel away the in the numerator we need
an in the denominator, So we make the unit fraction
and multiply it by the above like this
Then we can cancel the feet
and all that's left is
which is the same as
which reduces to fraction form
or decimal form 0.2840909091
Edwin
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