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A car traveled a distance of d miles in t minutes at an average rate

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Bunuel
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A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   23 May 2020, 09:14
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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


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A
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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   23 May 2020, 09:22
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IMO A

Distance= speed *time
D=r*t
D/r= t

Statement 1: t=30
D/r = 30
D/r = 30/1 => D:R = 30:1 (sufficient)

Statement 2: D = 25
Nothing given regarding R.
(Insufficient)

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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   23 May 2020, 11:06
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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


DS20557

Given: A car traveled a distance of d miles in t minutes at an average rate of r miles per minute.
Asked: What is the ratio of d to r ?
Distance = Speed * time
d miles = r miles/min * t min
d = r * t
ratio of d to r = d/r = t

(1) t = 30
ratio of d to r = d/r = t = 30
SUFFICIENT

(2) d = 25
Since r Is unknown
NOT SUFFICIENT

IMO A
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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   23 May 2020, 12:20
d/r = t, so (1) is sufficient.

However we cannot bring the ratio down to just d, so (2) is insufficient

Answer: A
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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   23 May 2020, 13:05
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

Ratio of D/ r means , we are asked T directly in disguised form.
Option 1; Answer is given directly.
Sufficient

2: D given, NO further information about r.
Insufficient

IMO A :
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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   14 Oct 2020, 06:34
distance = rate * time

d = r * t

d / r = t
d / r = 30
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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink] A car traveled a distance of d miles in t minutes at an average rate   14 Oct 2020, 07:57
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

We have to find d/r and the given relation is r= d/t

Statement 1: t=30; t=d/r therefore- d/r = 30.

Statement 2: Insufficient.

A is the correct answer choice.
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Re: A car traveled a distance of d miles in t minutes at an average rate [#permalink]
14 Oct 2020, 07:57
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