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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink]
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]
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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]
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]
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]
Expert Reply
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]
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]
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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]
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Re: A worker at a recycling factory needs to produce 100 cm3 of [#permalink]
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