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A worker at a recycling factory needs to produce 100 cm3 of

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A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   21 Mar 2019, 05:07
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A worker at a recycling factory needs to produce 100 cm³ of aluminum for an order. Which of the following solid aluminum items alone would allow the worker to meet his or her goal?


Indicate all possible values.

A. hemisphere with a diameter 7.5 cm

B. A right cylinder with radius 4 cm and a height 2 cm

C. A cube with side length 4.5 cm

D. A right rectangular prism with width 5 cm, length 7 cm, and height 3 cm

E. A sphere with radius 3 cm
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B,D,E
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   26 Apr 2020, 14:17
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Carcass wrote:
A worker at a recycling factory needs to produce 100 cm³ of aluminum for an order. Which of the following solid aluminum items alone would allow the worker to meet his or her goal?


Indicate all possible values.

A. hemisphere with a diameter 7.5 cm

B. A right cylinder with radius 4 cm and a height 2 cm

C. A cube with side length 4.5 cm

D. A right rectangular prism with width 5 cm, length 7 cm, and height 3 cm

E. A sphere with radius 3 cm


I'm not a big fan of this question. The GRE does not require students to know how to find the volume of a sphere (or a hemisphere)

Cheers,
Brent
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   26 Apr 2020, 14:43
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I am a huge fan of you instead. I believe the GRE requires this.

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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   02 May 2020, 08:21
Can anyone clarify on this? does the FRE require to know the volume of the sphere or a hemisphere?

I have done tons of exercise and this is the first time during my prep that I encounter those volume
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   02 May 2020, 09:07
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mike1917 wrote:
Can anyone clarify on this? does the FRE require to know the volume of the sphere or a hemisphere?

I have done tons of exercise and this is the first time during my prep that I encounter those volume


In the Official Guide to the GRE General Test, the test-makers provide formulas for finding the volume of a rectangular solid as well as the volume of a cylinder.
The formula for the volume of a sphere (or hemisphere) appears nowhere in the book.

If there were an official GRE question that required the volume of a sphere, you would be provided with the formula.

Cheers,
Brent
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   05 May 2020, 23:00
Greenlight test Prep guy makes sense, there is no formula involved regarding the volume of the above mentioned shapes. DO NOT attempt the question, it is out of scope!
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   13 Jun 2020, 13:43
In any case, kindly provide the solution :)
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   13 Jun 2020, 14:01
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As Brent pointed out this question, basically, is not tested on the GRE.

So there is no need to discuss on it.

Regards
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   Updated on: 09 Aug 2020, 08:16
Farina wrote:
In any case, kindly provide the solution :)


The volume of a sphere is \(\frac{4}{3}\)*pi*\(r^3\)

From here, I would use 3.14 as a substitute for pi.

As was stated above, you don't need to know this formula for the GRE. Though I believe you do for the GMAT.

Originally posted by grenico on 08 Aug 2020, 15:07.
Last edited by grenico on 09 Aug 2020, 08:16, edited 1 time in total.
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   08 Aug 2020, 22:52
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Farina wrote:
In any case, kindly provide the solution :)


Area of hemisphere = 2* π* r^2 (Diameter is given as 7.5, thus radius is 3.75) Hence, area is 88.3

Area of right cylinder = π * r^2 * h = 16 * 2 * 3.14 = 100.48

Area of cube = e^3 = (4.5)^3 = 91.1

Area of rectangular prism = 2(wl+hl+hw) = 2(5*7 + 3*7 + 3*5) = 142

Area of sphere = 4 *π *r^2 = 4 *3.14 *9 = 113.04

Hence B, D, E.
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink] New post   09 Aug 2021, 02:52
Hello from the GRE Prep Club BumpBot!

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