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the surface area of this sphere
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30 Aug 2022, 09:01
30 Aug 2022, 09:01
Expert Reply
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Question Stats:
66% (00:56) correct
33% (01:18) wrong based on 6 sessions
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Attachment:
GRE prep club quant challenge.jpg [ 11.28 KiB | Viewed 1704 times ]
Quantity A |
Quantity B |
the surface area of this sphere |
615 sq m |
A. Quantity A is greater
B. Quantity B is greater
C. The two quantities are equal
D. The relationship cannot be determined from the information given
Part of the project: GRE QCQ & PS 3 Questions Every One DAILY Challenge - (2022)
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GRE Math Essentials (2022)
GRE Geometry Formulas
GRE - Math Book
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
GRE Math Essentials (2022)
GRE Geometry Formulas
GRE - Math Book
Re: the surface area of this sphere
[#permalink]
31 Aug 2022, 06:15
31 Aug 2022, 06:15
1
Solution -
Surface Area of a Sphere is A=4πr^2
Here, the radius is 7m as given in the figure.
Thus, A=4π(7)^2
=> A=4πr^2
=> A = 4*(22/7)*(7)*(7)
=> A = 616 sq m
Hence, Quantity A is 616 sq m and Quantity B is 615 sq m.
Therefore, Quantity A is greater than Quantity B.
Correct Answer A.
Surface Area of a Sphere is A=4πr^2
Here, the radius is 7m as given in the figure.
Thus, A=4π(7)^2
=> A=4πr^2
=> A = 4*(22/7)*(7)*(7)
=> A = 616 sq m
Hence, Quantity A is 616 sq m and Quantity B is 615 sq m.
Therefore, Quantity A is greater than Quantity B.
Correct Answer A.
gmatclubot
Re: the surface area of this sphere [#permalink]
31 Aug 2022, 06:15
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