Question
If radius of a sphere is decreased by 48%, then by what
percent does its surface area decrease?Solution
Let the radius of sphere = 100 Area of sphere = 4π ×10000 When radius decreased by 48% So, radius =52 Then area = 4π×2704 Decreased surface area = 10000-2704=7296 Percent of decrease = (7296/10000) ×100 =72.96%
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