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Rain is falling at a rate of 3 centimeters per hour all over Springfie

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Bunuel
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Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   30 Jun 2016, 07:49
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Rain is falling at a rate of 3 centimeters per hour all over Springfield. Somewhere downtown in Springfield a group of pigeons is waiting for the rain to stop. If the rain filled a round puddle the with a base area of 350 square centimeters and a depth of 13.5 centimeters, how long did the pigeons wait for the rain to stop?

A. 3 hours and 12 minutes.
B. four hours and 30 minutes.
C. four hours and 45 minutes.
D. five hours and 10 minutes.
E. five hours and 30 minutes.
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Senthil1981
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   30 Jun 2016, 08:56
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Answer is : B, 4 hours and 30 mins

The volume of the puddle is irrelevant and only height matters since rain fell all over the city.
Thus, it takes only . 13.5 / 3 = 4.5 hours of rain to fill the puddle
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   30 Jun 2016, 10:15
we only have to deal with the depth, which is 13.5 cm
time taken = 13.5/3 = 4 hour 30 minutes.
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   05 Jul 2016, 21:19
Senthil1981 wrote:
Answer is : B, 4 hours and 30 mins

The volume of the puddle is irrelevant and only height matters since rain fell all over the city.
Thus, it takes only . 13.5 / 3 = 4.5 hours of rain to fill the puddle


interesting, why would only the depth matter? I'm envisioning half a sphere, meaning the height wouldn't fill in a linear fashion - or should i be envisioning a cylinder instead?
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   05 Jul 2016, 22:33
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Bunuel wrote:
Rain is falling at a rate of 3 centimeters per hour all over Springfield. Somewhere downtown in Springfield a group of pigeons is waiting for the rain to stop. If the rain filled a round puddle the with a base area of 350 square centimeters and a depth of 13.5 centimeters, how long did the pigeons wait for the rain to stop?

A. 3 hours and 12 minutes.
B. four hours and 30 minutes.
C. four hours and 45 minutes.
D. five hours and 10 minutes.
E. five hours and 30 minutes.

Puddle means a pool of standing water....

In this question, height of puddle is given and its base area.

Then, rate of rain is given. Since, rate is given , we have to assume that at any point on the surface rain takes 1 hr to fill that point 3 cm .


With this logic, we only need to know height of standing water(puddle).

13.5\3

4.5 hrs
mdacosta wrote:
Senthil1981 wrote:
Answer is : B, 4 hours and 30 mins

The volume of the puddle is irrelevant and only height matters since rain fell all over the city.
Thus, it takes only . 13.5 / 3 = 4.5 hours of rain to fill the puddle


interesting, why would only the depth matter? I'm envisioning half a sphere, meaning the height wouldn't fill in a linear fashion - or should i be envisioning a cylinder instead?



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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   06 Jul 2016, 02:33
I got my answer right. But this is a different type of question.

The key take away is that the information - "base area of 350 square centimeters " is irrelevant.
It is only to confuse test takers. Practicing questions on GMATClub helps !
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   15 May 2018, 16:10
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Bunuel wrote:
Rain is falling at a rate of 3 centimeters per hour all over Springfield. Somewhere downtown in Springfield a group of pigeons is waiting for the rain to stop. If the rain filled a round puddle the with a base area of 350 square centimeters and a depth of 13.5 centimeters, how long did the pigeons wait for the rain to stop?

A. 3 hours and 12 minutes.
B. four hours and 30 minutes.
C. four hours and 45 minutes.
D. five hours and 10 minutes.
E. five hours and 30 minutes.


Since the puddle has a depth (or height) of 13.5 centimeters, and the rain falls at a rate of 3 centimeters per hour, the rain must have fallen for 13.5/3 = 4.5 hours or 4 hours and 30 minutes to fill the puddle to that height.

Answer: B
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink] New post   21 Feb 2022, 04:15
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Re: Rain is falling at a rate of 3 centimeters per hour all over Springfie [#permalink]
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