If
the radius of a sphere is halved then what is the
I decrease in its SA ?
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Answer:
The surface area ( 4πr²) gets reduced by 1/4
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Step-by-step explanation:
total surface area of a sphere is calculated by the formula 4πr^2
new radius = r/2
new surface area = 4π(r/2)^2 = 4π(r^2/4) = πr^2
the decrease in surface area is 4πr^2-πr^2 = 3πr^2
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