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The surface of a certain planet reflects 80 percent of the light that

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Bunuel
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The surface of a certain planet reflects 80 percent of the light that [#permalink] New post   17 Jan 2021, 03:52
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The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light. What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?

A. 32%
B. 40%
C. 48%
D. 60%
E. 88%
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C
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Re: The surface of a certain planet reflects 80 percent of the light that [#permalink] New post   17 Jan 2021, 04:08
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Light Reflected = 80%
Absorbed by Clouds = 40%
Not absorbed by Clouds = 60%

Total Not Absorbed = .80*.60 = .48 = 48%

Option C
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Re: The surface of a certain planet reflects 80 percent of the light that [#permalink] New post   17 Jan 2021, 07:52
Percentage of light reflected from the surface = 80%

Absorbed by the cloud =40%

Not absorbed by the cloud = (100-40)%=60%

Percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed =80%*60%*100=80/100*60/100*100=48%

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Re: The surface of a certain planet reflects 80 percent of the light that [#permalink] New post   17 Jan 2021, 08:53
Given: The surface of a certain planet reflects 80 percent of the light that strikes it. The clouds around the planet then absorb 40 percent of the reflected light.
Asked: What percent of the light that strikes the planet is reflected from the surface and passes through the clouds without being absorbed?

Light striking the planet = 100%
Light reflected from the surface = 80%
Light passes through the clouds without being absorbed = 80% (100%-40%) = 80% * 60% = 48%

IMO C
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Re: The surface of a certain planet reflects 80 percent of the light that [#permalink] New post   12 Dec 2023, 22:07
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Re: The surface of a certain planet reflects 80 percent of the light that [#permalink]
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