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2015-03-09T17:07:17+05:30

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Let previous radius=r
tsa= 4πr²
now radius=2r
tsa= 4π(2r)²=4π*4r²=16πr²

ratio between first and last=4:16
1 5 1
2015-03-09T17:28:18+05:30

This Is a Certified Answer

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Let Original radius be r.
A/Q-  New radius will be 2r.
Ratio of T.S.A. of new of sphere to old sphere
=4π(2r)²/4πr²
=4π×4r²/4πr²
=16πr²/4πr²
=4/1
The ratio will be 4:1.
2 4 2
I hope it will help you.
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