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500 ds test11 #23

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by dunkin77 » Thu Apr 19, 2007 12:14 pm
23. A car traveled a distance of d miles in t minutes at an average rate of r miles per minute. What is the ratio of d to r ?
(1) t = 30
(2) d = 25

Hi,

I thought the answer is C) but turned out to be A)... Can anyone please explain why A is correct?
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Re: 500 ds test11 #23

by Prasanna » Thu Apr 19, 2007 7:02 pm
dunkin77 wrote:23. A car traveled a distance of d miles in t minutes at an average rate of r miles per minute. What is the ratio of d to r ?
(1) t = 30
(2) d = 25

Hi,

I thought the answer is C) but turned out to be A)... Can anyone please explain why A is correct?

From the problem statement we get that d/t=r (distance/time=speed). We can state this as d/r=t. (1) says t=30 which is the ratio of d to r and hence the answer is A.
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