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GRE Prep Club Team Member
Joined: 20 Feb 2017
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A circular lawn with a radius of 5 meters is surrounded by a circular
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05 Mar 2021, 06:00
05 Mar 2021, 06:00
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A circular lawn with a radius of 5 meters is surrounded by a circular walkway that is 4 meters wide (see figure). What is the area of the walkway?
A. \(20π\) \(m^2\)
B. \(24π\) \(m^2\)
C. \(32π\) \(m^2\)
D. \(48π\) \(m^2\)
E. \(56π\) \(m^2\)
Re: A circular lawn with a radius of 5 meters is surrounded by a circular
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05 Mar 2021, 07:58
05 Mar 2021, 07:58
1
Let's take r1 = 5 so radius of the whole circle = 9
Area = π * \(r^2\) = 81π
Area of lawn = π * \((r1)^2\) = 25π
Hence,
Area of walkway = Total area - area of lawn
= 81π - 25π = 56 π
Answer E
Area = π * \(r^2\) = 81π
Area of lawn = π * \((r1)^2\) = 25π
Hence,
Area of walkway = Total area - area of lawn
= 81π - 25π = 56 π
Answer E
gmatclubot
Re: A circular lawn with a radius of 5 meters is surrounded by a circular [#permalink]
05 Mar 2021, 07:58
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