Question

if the radius of a sphere is trebled, what will be the change in its
volume and surface area

Answer 1

hey mate !!!❤✌
here's ur answer ⤵⤵⤵⤵

➡ Volume 1 = 4/3πr^3
Volume 2 = 4/3π(3r)^3 ( after making the radius 3 times )
= 4/3π27r^3
= 27[4/3πr^3]
☣ The volume becomes 27 times.
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☄☄☄☄☄☄☄☄☄☄☄☄☄☄
➡ S.A. = 4πr^2
after change
= 4π(3r)^2
= 4π9r^2
=9[4πr^2]
☣The area will become 9 times...
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⭐ hope it helps ⭐