the radius of sphere is decreased by 25%.find the percentage in decrease in area
Answers
Answered by
7
Answer:
56% is the correct answer!!!!!!
Answered by
0
Answer:
43.75% is the correct answer
Step-by-step explanation:
Original Diameter =d
Original CSA=4π(2d)2=πd2
New Diameter =d−10025d=43d
New CSA=4π(83d)2=169πd2.
% decrease =πd2(πd2−169πd2)×100
=πd2πd2(1−169)×100
=1616−9×100
=43.75%.
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