the diameter of a sphere is decreased by 25% by what percent its curved surface area decrease
the diameter of a sphere is decreased by 25% by what percent its curved surface area decrease
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AnswEr:
Let r be the radius and S be the curved surface area. Then,
It is given that the diameter decreases by 25%. Therefore,
Decreased Radius
↝Let be the new curved surface area. Then,
Decrease in curved surface area.
• So, percentage decrease in curved surface area is equal to